Malicious PDF — malware analysis report

Static analysis result for SHA-256 737bdbf4f6f074b7…

MALICIOUS

PDF

69.4 KB Created: 2020-08-07 06:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54769314961ca4cba82a14f5271348da SHA-1: d8b3526f55189203ff7adadd370fad0f013bc4b6 SHA-256: 737bdbf4f6f074b70eff46866c41e6517b62d8be3ba47495081a04e7ca190d6e
202 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a known malicious redirector, and exhibits characteristics of an advance-fee scam. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure. The presence of embedded links and the advance-fee scam lure strongly suggest a phishing attempt designed to trick the user into visiting malicious infrastructure.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=amoeba+sisters+enzymes+pdf
    • http://files.libertyhealthandbeauty.com/uploads/1/3/1/4/131438449/ramasuza.pdf
    • http://files.vmp-events.com/uploads/1/3/1/4/131453907/pirugopojuwadu_vanolojisuz.pdf
    • http://suzimofu.coscinecreative.com/uploads/1/3/1/4/131453247/32e25e611d.pdf
    • http://files.aweonline.com/uploads/1/3/1/3/131380849/97e931cc63602f.pdf
    • http://files.sags.org.uk/uploads/1/3/1/1/131164488/b9d0cec.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/10903964037.pdf
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/azoospermia_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0434/4191/4006/files/tukumupepaxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5880/7455/files/ruxesupuwagufirujope.pdf
    • https://cdn.shopify.com/s/files/1/0429/2342/5955/files/64659086845.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/bajoxiv.pdf
    • https://cdn.shopify.com/s/files/1/0446/8133/0841/files/postman_api_documentation.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/70781395432.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8434/files/class_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/0706/5760/files/chemistry_equations_list.pdf
    • https://cdn.shopify.com/s/files/1/0448/3337/4369/files/how_to_do_chakra_meditation.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/zulixidiferezuguranelul.pdf
    • https://cdn.shopify.com/s/files/1/0437/6372/8545/files/77171903401.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_off0000d0e7.bin
8dfad76258d03891ef34be70cb00f81f34c04ffe40ae22ecc97542dcd122570d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E7 5436 bytes
font_01_sfnt_off0000e355.bin
aefcd005bef661ee9650bbe1b3ebbbfa4ce6aec13fb8d7a797cecd69e98d52c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE355 10368 bytes

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