Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c77a9d6158f683f…

MALICIOUS

PDF

44.1 KB Created: 2020-08-12 03:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 484f609b30c0793e45177983fdd220c9 SHA-1: 70114a7d6ddef734a7f2d278ca31bde0334d29e6 SHA-256: 9c77a9d6158f683ff56f234d5b41a67aba78b42fd33288ae3a376c257ffbcd96
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests a link farm or SEO poisoning attack designed to lure users to malicious infrastructure.

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.ru/pify?keyword=accounting+concepts+in+telugu+pdf In PDF document text
    • http://files.jjohnsonartist.com/uploads/1/3/1/6/131606758/202e5c5c96aa2.pdfIn PDF document text
    • http://xuvika.lorenasantacruz.com/uploads/1/3/1/3/131383943/3fa74a4.pdfIn PDF document text
    • http://files.deanmelbourne.com/uploads/1/3/1/4/131438079/vogenu-madevuvejepisul.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/1/0430/5240/0789/files/d_d_descent_into_avernus_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/45004180225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1237/5207/files/midufemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6957/0198/files/wenepirega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/pegowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1712/3493/files/doduzibiliwajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/cyclothymia_dsm_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9341/7367/files/sagekogepidugupudesinaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/traditional_and_modern_concept_of_marketing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9853/6091/files/free_keto_recipes_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84593422723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6728/4379/files/26386060571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/87176212915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7962/2040/files/melizozitez.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_off000062a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A6 4888 bytes
SHA-256: 4feba3ae9ca435259638f24243e1d9ecbb2afc624197f72520620a996296f70d
font_01_sfnt_off0000735a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735A 9900 bytes
SHA-256: 23f8ec7f9ac84db7eac348aadc826e33900afe30b0a10dae092b55a621d914cb
font_02_sfnt_off0000951a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x951A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3