Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d651162189c91d3…

MALICIOUS

PDF

40.7 KB Created: 2020-08-17 13:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1891f15dd17a14a3d1d997cb5536e1ad SHA-1: 6a141eb28b9bbac668959f3c5eb39edf7d62f8c5 SHA-256: 7d651162189c91d34053558e174bc400c655825a5d4a148599f9126606c0ec43
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms and redirectors, indicating a phishing or scam attempt. The primary malicious URL identified is a redirector designed to obscure the final destination. The ML classifier strongly indicates maliciousness, and the presence of numerous links suggests an attempt to drive traffic to potentially harmful sites.

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=u+dictionary+app++for+windows+7
    • http://fabitane.greaterraleighchapter.com/uploads/1/3/0/7/130739629/jogulagavopu.pdf
    • http://files.abilenecares.org/uploads/1/3/2/6/132695782/xirime_sunakox_fikop_xalunoxipifokim.pdf
    • http://files.stuffbyjonbonner.com/uploads/1/3/0/7/130775215/3030264.pdf
    • http://senumo.oscarmoralesfotografia.com/uploads/1/3/1/3/131383544/vixomikew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2874/1285/files/osrs_1-_99_herblore.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0589/files/savizokewinar.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/zujaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/citizen_eco_drive_skyhawk_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/18447811624.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0674/files/wozapibisezuruzed.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9493/files/52240004157.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/venom_2018_imdb_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/93188325552.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/lutulam.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/audit_bureau_of_circulation_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/phase_1_and_phase_2_reactions_in_drug_metabolism.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_off0000616c.bin
46efda1680bdee28f1d42c7439088676ad5c5401874339394a43eed36fa37d99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x616C 5384 bytes
font_01_sfnt_off000073e5.bin
82a19edf0a0913c561f66cd371b0c2d770b6b50c0116c519c42df9c7d4168477		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E5 9888 bytes

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