Malicious PDF — malware analysis report

Static analysis result for SHA-256 6418932d4dcd3fc9…

MALICIOUS

PDF

44.4 KB Created: 2020-08-10 10:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff95d12813f5940807002f4fef165b6a SHA-1: c01bb1cedd87c9ecbc401a1666a5781961253b03 SHA-256: 6418932d4dcd3fc96153513fa9910ca6920a459f208fa69bbe1978ae948be017
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains references to 'aircraft maintenance manual boeing 737 pdf' and a malicious URL, suggesting a phishing or scam attempt. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or distributing further malicious content.

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=aircraft+maintenance+manual+boeing+737+pdf
    • http://files.northwoodwaterpolo.com/uploads/1/3/0/9/130969368/zawigepo-sobotaxiz-nutimesafuwel-nekugusisusafom.pdf
    • http://gapusu.kalyanv.org/uploads/1/3/1/0/131070722/5425735.pdf
    • http://files.fancy-dancer.com/uploads/1/3/2/7/132712011/buxuramok_pikuteredebaw_muwaso_fefuke.pdf
    • http://vugokakep.mtchoirs.com/uploads/1/3/1/4/131408280/4158123.pdf
    • http://files.bcm-nl-incidents.eu/uploads/1/3/1/3/131379409/gufetedevera.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/seating_arrangement_with_blood_relation_problems.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/factoring_polynomials_with_common_monomial_factor.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/42767759737.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0748/files/sequences_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/79026614615.pdf
    • https://cdn.shopify.com/s/files/1/0435/8085/0335/files/yoga_for_knee_pain_relief.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/types_of_cerebral_palsy.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39806276645.pdf
    • https://cdn.shopify.com/s/files/1/0438/5921/4501/files/kerabegozepobinexufafu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2186/7930/files/1922947734.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdf
    • https://cdn.shopify.com/s/files/1/0438/0586/8193/files/plies_da_realist_songs.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_off00006dbd.bin
11a71ab0cd59eed88e1bdc106af8fdf160061dec922ed6859987bc1a0fa1e1a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBD 5672 bytes
font_01_sfnt_off000080fa.bin
623784cec1634f7ba705b63d2e4c9d0f4a604a5dfb4241c19cf3588e811d45b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80FA 10376 bytes

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