Malicious PDF — malware analysis report

Static analysis result for SHA-256 b76cb2c579aebe33…

MALICIOUS

PDF

52.9 KB Created: 2020-07-23 08:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 78c3d7b63888b438b225edec32d2459b SHA-1: a85d346043e9647d1c93ff8483e41866bd3bbd47 SHA-256: b76cb2c579aebe33cc5f0dc3ffadb8fb11c1e537cbde0039ee1a586ec9607af7
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. Another critical heuristic identified a PDF link farm hosted on cdn.shopify.com, suggesting a coordinated effort to distribute malicious content or engage in SEO poisoning. The document body, though heavily obfuscated, contains keywords related to 'postnatal complications pdf' and application metadata, which are likely lures.

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.com/wb?keyword=postnatal%20complications%20pdf In PDF document text
    • http://files.ifafrog.com/uploads/1/3/1/8/131857650/8037009.pdfIn PDF document text
    • http://files.marcleverettephotography.com/uploads/1/3/1/4/131409200/kiwovulej-zufuxemowedani.pdfIn PDF document text
    • http://files.lexiweege.com/uploads/1/3/0/7/130739239/270c42059f01.pdfIn PDF document text
    • http://files.chantrydancecompany.org/uploads/1/3/1/4/131437158/bebd5c92.pdfIn PDF document text
    • http://files.cranberryportage.net/uploads/1/3/0/8/130874658/bikinos.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/1/0437/2011/4331/files/lifutezorubufokabidurodeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/paxuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/fibeze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4083/3690/files/sisejateritufurifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8003/2160/files/76305559530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/96421019061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/lewobovibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/tujabomovipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigagijewunafusigiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/tudezuxulazel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3663/0422/files/39156193133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/wagopuwurebemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wurawosupamajo.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 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_off0000895b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x895B 4876 bytes
SHA-256: a917bf6f70e8648aee52acb5d1b03b11948f3af040f792cdcf035e522c6458de
font_01_sfnt_off000099ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99CE 14088 bytes
SHA-256: 9c310ad1bd63bab907ef28b0832e4613f1cc082ee59f616554a0174113d2abef

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