Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff0ede97565a8eb…

MALICIOUS

PDF

34.2 KB Created: 2020-08-20 19:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fd05fa5290945f318e0f7aece246a1a SHA-1: ae2c7cf1a7efc169d09daf1241e28e96594960d9 SHA-256: 5ff0ede97565a8ebadf1e05ad4265cafc78b0b2b174645197407646e1f313b61
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though obfuscated, contains text related to 'calorimetry worksheet problems' and the malicious URL, suggesting a lure. The presence of many external PDF links, some pointing to benign Shopify domains and others to unknown hosts, indicates a link farm or redirection strategy. No scripts were extracted, but the overall structure and malicious link point to a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=calorimetry+worksheet+problems
    • http://files.neverleaveonebehind.org/uploads/1/3/0/7/130776291/fasoramo_vibotemepo.pdf
    • http://files.lvmphotoshuntingtonwv.com/uploads/1/3/0/7/130775953/kalutotizuduri_wawiwurabalaz_javopedeka.pdf
    • http://files.gfhsmt1964.com/uploads/1/3/1/6/131636941/ccd4dfde99aa0.pdf
    • http://files.riscooper.com/uploads/1/3/1/4/131437889/891101.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0377/1041/files/48159527094.pdf
    • https://cdn.shopify.com/s/files/1/0462/3961/3079/files/envelope_template_dl_size.pdf
    • https://cdn.shopify.com/s/files/1/0450/2791/7974/files/rise_of_kingdoms_research_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2855/3634/files/askep_atresia_ani_pada_bayi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/cephalalgia_headache.pdf
    • https://cdn.shopify.com/s/files/1/0437/0422/1849/files/adapaleno_gel_bula.pdf
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/35118445627.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/83316779102.pdf
    • https://cdn.shopify.com/s/files/1/0434/4732/0728/files/69836386394.pdf
    • https://cdn.shopify.com/s/files/1/0429/0671/4268/files/watogipub.pdf
    • https://cdn.shopify.com/s/files/1/0437/5665/0645/files/25500962044.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_off000046ed.bin
30aec687b2c88ac5da5d59dee3266b90e2e598a4d4018d9983faa2089c1dbda1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46ED 5364 bytes
font_01_sfnt_off00005915.bin
e3d2bb071fb2317dd5231adba78c999735c474c301210df15e2ec173845df655		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5915 9772 bytes

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