Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0fb6565d7b9353d…

MALICIOUS

PDF

49.1 KB Created: 2020-09-14 05:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a6496459296673e422bb2572ddba43dd SHA-1: 8959fde4ff169e4ca16322375a9b2a6f554167e1 SHA-256: a0fb6565d7b9353d75580c81672bf7a3eba32dd2d761448546c5d57392fa97e5
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a mass link farm, suggesting an attempt to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.me/wix?keyword=32oz+to+one+gallon In PDF document text
    • http://files.countrycharmflorist.com/uploads/1/3/0/9/130968984/1983710.pdfIn PDF document text
    • http://vatevete.outonalimbdance.com/uploads/1/3/0/8/130874588/mepidukokuburinak.pdfIn PDF document text
    • http://files.reidswoodworks.com/uploads/1/3/1/8/131857199/gimavudumube_wuluji.pdfIn PDF document text
    • http://files.pamelatuazon.com/uploads/1/3/2/6/132696558/8734884.pdfIn PDF document text
    • http://zefomuwe.beejaysecuritydoors.com/uploads/1/3/1/1/131164250/xukeguzodupeti.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/1/0433/0687/7080/files/63491738983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7746/8327/files/cubs_2020_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8023/4661/files/73866435169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7796/7776/files/lofepijifemuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/femugofinus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/epistar_chip_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3664/7317/files/1788520541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5196/4830/files/sears_radial_arm_saw_recall.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/throwing_up_emoticons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/wurapaviwizupugane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7257/0012/files/5794058502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2372/0602/files/block_blob_tostream.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8060/6111/files/xatitipe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6074 4572 bytes
SHA-256: f31da6d88548eec5c851a0f80c4f997e1a9dd6836ad01586cdddc4ec83b74a64
font_01_sfnt_off00007010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7010 10316 bytes
SHA-256: c2e894da3d7eaac72133a9b1338f14e2bbbe30fd6216a5ba3073212a8e7b0fad
font_02_sfnt_off00009391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9391 16216 bytes
SHA-256: 9aaf374d64521945a2d179b3de22a0ad451813c1e8d23897d9514ef9876b453b
font_03_sfnt_off0000a8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8C7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361