Malicious PDF — malware analysis report

Static analysis result for SHA-256 816258ba581d580c…

MALICIOUS

PDF

46.1 KB Created: 2020-08-03 23:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a6e3c673afb33fb101a14cd40282d10 SHA-1: ad7f55c0dd2096cb67e9e547d8039f54a6d4af3e SHA-256: 816258ba581d580cb3def927dcb3dc9146fac992c5bc3a6081453e76d3f3d32d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. While some links lead to benign Shopify-hosted PDFs, the presence of the redirector and the sheer volume of links suggest an attempt to manipulate search engine results or lure users to malicious content. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=batho+pele+principles+social+development+pdf In PDF document text
    • http://files.alexandriaponce.org/uploads/1/3/0/7/130775639/20913e4cd4f5e21.pdfIn PDF document text
    • http://files.jobranemerhi.com/uploads/1/3/1/4/131406412/xufafomonag.pdfIn PDF document text
    • http://files.inspiredwomenbusinessalliance.org/uploads/1/3/1/1/131163723/8871381.pdfIn PDF document text
    • http://files.treeoflifementoring.com/uploads/1/3/2/7/132740362/tujoxanera-faxemetubunu-difanovisaxe.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/1/0430/8389/0850/files/starbucks_franchise_cost.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9791/5545/files/sixokuxed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4800/8866/files/47891187189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/1550051699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4679/5424/files/97_subaru_legacy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/vilixodakogewad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8788/8535/files/vopopuwaxakevafamodaxasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1483/8679/files/jerosegulimezetuwix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89573664631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6447/5299/files/total_gym_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gevuruliwineda.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
🗂 Part of campaign: davidmossac.com 4 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB5 5292 bytes
SHA-256: 083eb27538002a4a03a5677347e2e6317945e6cb5e48527fc2691bb75f02c8ae
font_01_sfnt_off00007c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C89 9620 bytes
SHA-256: ed1f73eb5e33b6efda58a27fddb9a5d525a74b89f81342bfb9e8a90fd0a0ee96
font_02_sfnt_off00009d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D6D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3