Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe2bbaf27358234…

MALICIOUS

PDF

43.8 KB Created: 2020-08-14 15:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 246a1b519e9c7ddd942cad2e5a533cf8 SHA-1: 28398d74a0d489e62e58303c88e79e856464d5fa SHA-256: 2fe2bbaf27358234cceb26b9984965b4758f564f5161ae5c4b93dbc0773b3ed2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm designed for SEO manipulation. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.cc/pify?keyword=bursting+dust+devils+guide, which is likely used to redirect users to further malicious content. The document body contains numerous links to external PDFs hosted on various domains, including many on cdn.shopify.com, suggesting a broad attempt to distribute content or manipulate search results.

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=bursting+dust+devils+guide
    • http://varoturam.mountainparkevents.com/uploads/1/3/1/4/131409090/cfe20be.pdf
    • http://legexip.kracek.com/uploads/1/3/0/8/130874050/5579182.pdf
    • http://files.peterboroughtempleband.com/uploads/1/3/1/1/131164250/4242959.pdf
    • http://files.daniellebreisach.com/uploads/1/3/1/3/131383838/4417716.pdf
    • http://files.shootingstarbotanicals.org/uploads/1/3/0/8/130873855/9478650.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/colombo_road_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/25411973236.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/lapumafagef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/fidibesutodexowegelavani.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/rozumekudefogupabegoxu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/isotopes_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2418/files/74107585012.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/xinevategeragezexisabogu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7770/4607/files/thinking_in_java_8th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/0445/9170/files/82241674809.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/brainstorming_for_research_topics.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e00.bin
553b235d1cd47c0be57f339bf034564b9596ad4919296a29a61b52bca7363133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E00 4892 bytes
font_01_sfnt_off00007ebb.bin
9c93a662d6095dac482210dbeb0ceab12be5fb27b0f1c8d34608b17034de1ae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBB 10380 bytes

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