Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b310dde2c9e526…

MALICIOUS

PDF

44.1 KB Created: 2020-08-25 22:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c704083d38ba034988b4c150250132d5 SHA-1: c99418f511098d5a91eaa39d1c2bae50e14aa773 SHA-256: 22b310dde2c9e526b44c0f0e30a7440f4c559ab23d8e71af43d7c1d5bd2d11ee
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link disguised as an "Apa manual 8th edition" that redirects to a malicious URL (https://ttraff.me/pify?keyword=apa+manual+8th+edition). This indicates a social engineering lure designed to trick users into visiting malicious infrastructure. The presence of numerous other PDF links, many hosted on shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted, but the primary attack vector is the malicious redirector link.

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.me/pify?keyword=apa+manual+8th+edition
    • http://ziretemov.robertjlancaster.com/uploads/1/3/1/6/131637881/9038015.pdf
    • http://files.adventurewoodchildcare.com/uploads/1/3/2/6/132682822/af5995aa12d.pdf
    • http://files.autumntheodorephotography.com/uploads/1/3/1/6/131608016/d457ad266e6d7.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0933/files/28919590241.pdf
    • https://cdn.shopify.com/s/files/1/0435/7357/5841/files/gukidejigoribivebokipo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6007/files/ximawawidudid.pdf
    • https://cdn.shopify.com/s/files/1/0431/4847/6572/files/ahts_vessel.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/jalozojubedanemaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/30015483655.pdf
    • https://cdn.shopify.com/s/files/1/0428/2023/9519/files/admission_form_sample_for_school.pdf
    • https://cdn.shopify.com/s/files/1/0435/6499/0632/files/7209582346.pdf
    • https://cdn.shopify.com/s/files/1/0440/6388/3429/files/18360131825.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2354/files/78212720564.pdf
    • https://cdn.shopify.com/s/files/1/0431/3668/0102/files/48054476488.pdf
    • https://cdn.shopify.com/s/files/1/0434/7166/7360/files/33203533485.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/autonomous_desk_won_t_go_up.pdf
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/2088684773.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_off00006f29.bin
7de9b2b07c8b006e93a78f8552b59c1c7f05c6a8ad393d2b40ad1b31b30462dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F29 5108 bytes
font_01_sfnt_off0000805b.bin
4f6a70ce118adb9e1dcef55d66fbcc910ae92a50ab9ef5d891f19767e1ecbb16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x805B 10336 bytes

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