Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c7e0689983d4ce…

MALICIOUS

PDF

45.5 KB Created: 2020-08-19 21:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3135558ba5209627dd7c8d8514d15db SHA-1: e69d9a26c72f6ab10dc41fdfb5dd9b8f419e4da8 SHA-256: b2c7e0689983d4ce8cda468518e7c2b123a6f746b0a6d29858df96f58dff7b20
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm strategy. The primary malicious URL identified is https://ttraff.cc/pify?keyword=chance+the+rapper+snl+performance, which is likely used to redirect users to a malicious site. Another embedded URL, https://cdn.shopify.com/s/files/1/0437/3594/1274/files/fijejajezexewasojeretu.pdf, is also present.

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=chance+the+rapper+snl+performance
    • http://files.journalismuca.com/uploads/1/3/1/4/131453208/gurasuxe.pdf
    • http://files.mandarinspeakingplayground.com/uploads/1/3/0/7/130739340/jawomonu-rejax.pdf
    • http://gaxenur.rooted-organics.com/uploads/1/3/1/4/131437594/wexibupewimegonuzafu.pdf
    • http://fomip.audielauf.com/uploads/1/3/2/7/132740873/ad5d5a507c75.pdf
    • https://cdn.shopify.com/s/files/1/0437/3594/1274/files/fijejajezexewasojeretu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/characteristics_of_gram_negative_bacteria.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/vovevik.pdf
    • https://cdn.shopify.com/s/files/1/0437/2273/5767/files/posazuzofufoxopozojotenu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/files/xemepubapotewamudolid.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/acls_pretest_code.pdf
    • https://cdn.shopify.com/s/files/1/0430/5833/1799/files/accounts_payable_aging_report_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/93590387228.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/veterinary_cytology.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/crash_course_gastrointestinal_system.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/pomopadeti.pdf
    • https://cdn.shopify.com/s/files/1/0428/5068/0991/files/fepewegawojozake.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a0d.bin
16e3f261e3c2c682401aa22cffa5fe16ecc5d1414feac8d83304e6eeed89d77f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0D 5160 bytes
font_01_sfnt_off00007b5e.bin
01d89f79120567c851dea0caa5b5ee7547c8211069383f1d59f8dd00f92a958c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5E 2464 bytes
font_02_sfnt_off00008639.bin
d4684eba18b732664b65716de4e5d7cd971f41f637c741d258f134c65f4bce8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8639 10048 bytes

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