Malicious PDF — malware analysis report

Static analysis result for SHA-256 8512d67a8d7de35a…

MALICIOUS

PDF

45.0 KB Created: 2020-08-21 04:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf347daef8bed6f668506ce5e5e2bcd8 SHA-1: c4dab45a85ab9c8e1a4ff6eb364a5a058d3bee0a SHA-256: 8512d67a8d7de35a2238d095074e79b151402043d75052eb518b1d7e7f054921
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised as a lottery application form. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or SEO manipulation. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or redirection attack.

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=canada+lottery+application+form+2018
    • http://files.umuahiafamilyunion.org/uploads/1/3/1/0/131070754/9209311.pdf
    • http://files.islamicrevolutionary.com/uploads/1/3/1/6/131606072/d90dc.pdf
    • http://files.zpnaturalbeauty.com/uploads/1/3/1/8/131871740/3276372.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/wemodinixipadomofukiwotas.pdf
    • https://cdn.shopify.com/s/files/1/0431/7688/6431/files/93295098076.pdf
    • https://cdn.shopify.com/s/files/1/0435/8357/0083/files/vuxirumumezoribiwevupig.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/light_reflection_and_refraction_class_10_important_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9829/files/pipus.pdf
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/gekibefadimusetarosurerex.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6027/files/blockchain_1._0_2._0_3._0.pdf
    • https://cdn.shopify.com/s/files/1/0433/7611/5863/files/acid_rain_full_information.pdf
    • https://cdn.shopify.com/s/files/1/0444/5192/2087/files/articles_exercises_for_class_4.pdf
    • https://cdn.shopify.com/s/files/1/0430/1779/7785/files/business_accounting_and_finance_gowthorpe.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4602/files/powakesijibu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062a8.bin
3f720210bd0c15739696a606cf981fa0f3ecc7910b1af649ea3ca2719ad8ae59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A8 5556 bytes
font_01_sfnt_off00007585.bin
597e89d5b5c51d8457b8219ec5ea6968360c76820ae4940d7d38630d424ff0d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7585 10288 bytes
font_02_sfnt_off000098b2.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98B2 4324 bytes

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