Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ff7637f45e07bf…

MALICIOUS

PDF

56.7 KB Created: 2020-09-16 22:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a9ad239bfc8412e8271a2856eabaaf25 SHA-1: 055d935965134e39eec42ca4ad5ef712a0595e0a SHA-256: 79ff7637f45e07bf4ff683fff9eeb9dbf78f0cbf61fd3b5f5e208d19497b94c6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirection and a link farm designed to lure users. The embedded URLs, particularly the redirector link, are indicative of a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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.link/wix?keyword=where+the+wild+things+are+full+pdf In PDF document text
    • http://files.arisefromtheashes.com/uploads/1/3/1/6/131606295/mopiguwele-wopapolufapol-zoxabiv.pdfIn PDF document text
    • http://files.la-fll.org/uploads/1/3/1/0/131070313/2597918.pdfIn PDF document text
    • http://danolab.greatgorillarun.org/uploads/1/3/0/7/130775373/7547220.pdfIn PDF document text
    • http://files.smashmouthsweetsllc.com/uploads/1/3/2/6/132695470/kagideriterujo_bajixadukugufot.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/1/0431/7272/4897/files/garodegat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5604/5981/files/elementary_lesson_plan_template_editable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/53598975655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9067/1771/files/bamorusetosesurap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4601/0022/files/82822803122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/muputamureg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdfIn PDF document text
    • https://76b16949-3664-49eb-a989-f700e9f83932.filesusr.com/ugd/10cedf_3f587ef79b80496d9bfa78e7707e6420.pdf?index=trueIn PDF document text
    • https://9fdaf96f-9d23-440e-9e39-b04b540d41fc.filesusr.com/ugd/834936_288187f7ed0544c8a57e151898c12c75.pdf?index=trueIn PDF document text
    • https://70959d93-e771-4b22-ac6e-dce310db0d9e.filesusr.com/ugd/daca0d_6f7227a8b5f04410a7281d9d6c52b6e9.pdf?index=trueIn 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: la-fll.org 3 samples

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF0 5408 bytes
SHA-256: 6b6f218f9c10f29061856eeb249220c8bd96de11d60820fc4bbdc4ee04233c50
font_01_sfnt_off0000b171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB171 10696 bytes
SHA-256: 9c591c2736b2e18a275ccf0002f2481f3efd2475353eff8dbb0280f3fae28629

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