Malicious PDF — malware analysis report

Static analysis result for SHA-256 1555a566e5897951…

MALICIOUS

PDF

70.6 KB Created: 2020-08-03 12:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91409ba5dc696fa5df5942a0a6f79aff SHA-1: 483c4b34c2728da4b972fe1a6c885671b93793c7 SHA-256: 1555a566e5897951818619a0c6d3584be4baf82b022ef2f26031b26306083020
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=forgotten+realms+campaign+setting+pdf'. This indicates an attempt to lead the user to a malicious site. The PDF also contains a large number of external PDF links, suggesting a link farm or SEO poisoning tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly suggest an attempt to deliver a secondary payload or phish the user.

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.cc/pify?keyword=forgotten+realms+campaign+setting+pdf
    • http://files.wylieeastsoftball.com/uploads/1/3/0/7/130738769/d882ca6494258.pdf
    • http://files.werleaders.com/uploads/1/3/1/8/131871484/fibunure.pdf
    • http://files.yourlushgarden.com/uploads/1/3/0/9/130969987/5245057.pdf
    • http://files.mariacarella-yoga.com/uploads/1/3/0/8/130814052/tavogagaririwimam.pdf
    • http://files.pantaipetroleum.com/uploads/1/3/0/8/130814402/vulef_wutiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/64312777704.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/zunusijelewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6830/9152/files/how_to_use_bootcamp_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/66443610493.pdf
    • https://cdn.shopify.com/s/files/1/0436/4196/2649/files/vikewitogolobojojon.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/takodoperejepejipazewu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5462/files/32974855023.pdf
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/pobitazarepupumajidaxam.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/75611338409.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/loxidunadubufurepetiverox.pdf
    • https://cdn.shopify.com/s/files/1/0430/5843/0106/files/dolupok.pdf
    • https://cdn.shopify.com/s/files/1/0431/3828/5725/files/bepadiralipufiz.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_off0000d73a.bin
c77cd14bf0b8a6e036f59aebf2845583c606307b180c0f3538d6d9741f05ab5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD73A 5432 bytes
font_01_sfnt_off0000e9a4.bin
d378c870e6e23e976c2f2b89733fdd8008ed8d6d861fef09b9b41dce3312b6a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A4 10376 bytes

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