Malicious PDF — malware analysis report

Static analysis result for SHA-256 499b019ec39179a6…

MALICIOUS

PDF

40.8 KB Created: 2020-07-14 06:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9e8bcc0482f5760b535909afb3a4838 SHA-1: 147a4ed7bbdf9256dbb2853c552a1ac513f6a6d4 SHA-256: 499b019ec39179a62976779a8dd44b1fd5ed415ec9cb61d7da4ef0ebc5d18cb4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document also hosts a large number of external PDF links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, and the presence of a redirector link supports a phishing or malware distribution attack pattern.

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.com/wb?keyword=mitchell%20car%20repair%20manuals
    • http://files.suzannegreenofficial.com/uploads/1/3/1/4/131437147/d50d0ddc317868.pdf
    • http://files.datboop.com/uploads/1/3/2/6/132695915/rulitajekud.pdf
    • http://files.gbyws.org/uploads/1/3/1/4/131483019/paludizixi-pazibokadelok-xovubonavegazuz-nobuxudisapefod.pdf
    • http://files.mootingsyndicate.org/uploads/1/3/1/4/131483253/lewotidedimitufemini.pdf
    • http://files.mootingsyndicate.org/uploads/1/3/1/4/131483253/lewotidedim
    • https://bitepon.files.wordpress.com/2020/07/rawozunosoguparapusi.pdf
    • https://pezufonitibi.files.wordpress.com/2020/07/lidadopowubuneta.pdf
    • https://letagametaj.files.wordpress.com/2020/07/30775132928.pdf
    • https://jefifomoku.files.wordpress.com/2020/07/9118974606.pdf
    • https://jifumulunubi.files.wordpress.com/2020/06/19800841389.pdf
    • https://kuperira.files.wordpress.com/2020/07/bogoxul.pdf
    • https://vegixawazi.files.wordpress.com/2020/07/dikigazinopivakaxuw.pdf
    • https://zoradake.files.wordpress.com/2020/06/dugixomigutefisali.pdf
    • https://cdn.shopify.com/s/files/1/0434/8094/0709/files/gopobipabegulesididenu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/24183366497.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/22479982647.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25781613666.pdf
    • https://cdn.shopify.com/s/files/1/0428/9092/0099/files/84176416793.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7494/files/32355677872.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_off00006328.bin
81b1623cfef44d0c3f7271be1bccf9c664cb675f62ebec4da2b61a7f7695dbef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6328 4952 bytes
font_01_sfnt_off000073cc.bin
362df278bdcbff3b95bfa47188cee46084b3ce05525548d5536bdf65e45e4043		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CC 10196 bytes

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