Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ab57fef8e3db6b…

MALICIOUS

PDF

46.5 KB Created: 2020-08-19 17:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4da643ac993d6d55532ba44db8328d1d SHA-1: 3c81e01ab33c50af056d0d512958532909d7e82b SHA-256: 09ab57fef8e3db6b212c74add8b037b788af3daa6b784446c3a175a8ed327923
174 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to Shopify domains, suggesting an attempt at SEO poisoning or link farming to drive traffic to malicious sites. The primary malicious link, 'https://ttraff.cc/pify?keyword=ambersil+contact+cleaner+safety+data+sheet', is flagged as a known redirector to malicious infrastructure. The document body, while heavily obfuscated, contains references to the 'Ambersil contact cleaner safety data sheet' and the malicious URL, reinforcing the lure.

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.
  • 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) 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/pify?keyword=ambersil+contact+cleaner+safety+data+sheet
    • http://files.unintentionaladdict.com/uploads/1/3/1/4/131452935/loworoxipe_jifulawafiko.pdf
    • http://files.supportacrafter.co.za/uploads/1/3/1/3/131381612/3469679.pdf
    • http://files.roosterdaydemopolis.com/uploads/1/3/1/0/131070207/842870bbf2ad1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0494/4807/files/60683907913.pdf
    • https://cdn.shopify.com/s/files/1/0433/9043/5495/files/herbert_blumer_symbolic_interactionism.pdf
    • https://cdn.shopify.com/s/files/1/0438/8664/1304/files/xufusexowupojosezajefoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/38446633504.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/logitech_z-_640.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7562/files/zukapepozubavijuxomunije.pdf
    • https://cdn.shopify.com/s/files/1/0430/8392/3609/files/15081998386.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/us_ntp_servers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/wozuvefamud.pdf
    • https://cdn.shopify.com/s/files/1/0443/0387/6252/files/hand_washing_steps_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/dakunixufagu.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/1814203604.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2871/files/xarovamodaxemo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7266/0390/files/21198917840.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a0f.bin
ce51226d0513984e2234eb5b49b55eeb0bf2b30827e4427b09f80cf3f69b5d31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0F 5492 bytes
font_01_sfnt_off00007c85.bin
706d0aed6ecf9b8f67accb32207bf5fb25cbf3dce33655006eb2271ebb5d5fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C85 15860 bytes

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