Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3705bae01ac88e8…

MALICIOUS

PDF

39.0 KB Created: 2020-08-15 03:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e9e2a365087b85dde18cd43950b6331c SHA-1: f07a5b32478d79220ca6c82819924619c85bba79 SHA-256: b3705bae01ac88e86349594bbb6215bb985e9d2338b1c759e3bbc36ad4e91537
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that suggests a lure, potentially for a callback phishing or tech-support scam. The presence of a link farm further indicates malicious intent to distribute content or redirect users. No scripts were extracted, limiting the analysis of direct payload execution.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/wb?keyword=nafsa%20manual%202015 In PDF document text
    • http://files.robinfarmer.com/uploads/1/3/1/3/131380627/78c412e7.pdfIn PDF document text
    • http://wenore.laroccamiahouse.com/uploads/1/3/0/8/130874601/xubivowatove.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/1/0433/3626/9983/files/rokubed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/linulepepevogudaxebuwus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/49547870916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/44267281498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/41954582694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3164/2780/files/10207649289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/conduct_disorder_workbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2952/7709/files/malaguena_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8022/8759/files/tavukifaduxakafaxesarujix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5863/4658/files/karamoxuvavib.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

Related samples 3

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_off00005883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5883 5236 bytes
SHA-256: 77892cb4b5b5fe6280f42af6706a3a4bcadb1d78923f4a060db1b79c8ba3e878
font_01_sfnt_off00006a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4E 11144 bytes
SHA-256: 145fdbff0ea45dbb3c453f4d61801b16334a97cf0ffe2bc3bebb6156c4a485d7

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