Malicious PDF — malware analysis report

Static analysis result for SHA-256 acca13493e31fe01…

MALICIOUS

PDF

52.0 KB Created: 2020-07-26 15:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e82eeb8788f92eed77bed252e01b3cc5 SHA-1: 39a5d0ced395df59dedf4a515fe3f2253aee159a SHA-256: acca13493e31fe01d96da1929c99251d010a7dd66fa6d79bae8318715250c8af
202 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, including a link to a known malicious redirector and a link farm of PDF files hosted on Shopify. The presence of a visual download button further supports a deceptive lure. The primary malicious URL identified is ttraff.com, which redirects to a page related to 'uc browser apkmirror'. The document body is heavily obfuscated and does not provide further context.

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=uc+browser+apkmirror In PDF document text
    • http://files.bonneygirlphotography.com/uploads/1/3/2/6/132681204/sapoxorufewodod.pdfIn PDF document text
    • http://files.allhottub.com/uploads/1/3/1/4/131409463/469ee07922c.pdfIn PDF document text
    • http://files.qualitycollectibletreasures.com/uploads/1/3/1/4/131406649/2084638e99d06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/nogixiwosataru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/tigufos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5583/2469/files/10701817522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/29174025192.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/15162147697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5544/8213/files/tazojuxotuligoxobare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1269/1867/files/xavisolowadojovom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/17356438179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/gezodifoposodegefot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/saruledelosusofimaxetikaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6862/8887/files/96822410594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/mizadetil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6091/2537/files/78293355740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/jikixobekozazuwonagov.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A5 4936 bytes
SHA-256: a74d93c847d960661f598fc460853e175a44a14be44eed9e96fa4a7b56dca060
font_01_sfnt_off00008975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8975 10260 bytes
SHA-256: 7674dd3a5b9540fc883e36e502f1806f2661afdc5b437ba2dddd660ba94411c0
font_02_sfnt_off0000acab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACAB 16204 bytes
SHA-256: 7fd64535976a653b4736ad1585a75217cf0a564ac44b6981ec5f997e3b90ecea