Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b2814703a81d7f…

MALICIOUS

PDF

41.3 KB Created: 2020-08-01 04:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 29430326d8da86bdeaf21f7cfb3dea06 SHA-1: 7445734d9330a314cceccb297d5aca0809b95abf SHA-256: c2b2814703a81d7f30588d5cb7291ad0d4cb3ccb3fc3291f7264ae57abc27045
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=asce+7-+10+pdf+download'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, a heuristic for a PDF link farm was triggered, suggesting a broad attempt to distribute malicious content. The presence of a visual download button lure further supports the social engineering aspect of this attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=asce+7-+10+pdf+download In PDF document text
    • http://files.deborahcostinenaturepuppets.com/uploads/1/3/0/9/130969356/a7175f6e63eee6.pdfIn PDF document text
    • http://files.uhbauerwomensociety.com/uploads/1/3/1/4/131409463/8935704.pdfIn PDF document text
    • http://files.thedailydelaney.com/uploads/1/3/0/7/130775607/1657418.pdfIn PDF document text
    • http://files.quillylife.com/uploads/1/3/0/7/130776828/4704254.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4959/8632/files/nugisefakagub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0465/6790/files/famivonupetiwobalubaxag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6872/7194/files/vufezelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/79061286344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9113/0536/files/32318518699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/lizubipirijosakaxulokel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3433/7695/files/84259634702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3655/6962/files/76484716384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7878/6965/files/5854421468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5139/2922/files/tokojokinoxenigopeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5312/files/54935898904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2997/8526/files/46227840473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5511/9512/files/fijafogufokapularatobamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1537/1932/files/vegolijavivefozu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5769 5100 bytes
SHA-256: 94803b5ad1975a4b98d02eff4dcd2af2470c30bd72caafb71961e1c3f564772a
font_01_sfnt_off000068e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E9 9764 bytes
SHA-256: f4e1aa4e13d8ded2e7bb5590cb48de99c4bceda35559b7ec6e22f85620d74019
font_02_sfnt_off00008a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A52 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3