Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be8af258f67de04…

MALICIOUS

PDF

63.5 KB Created: 2020-08-07 03:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bff9fc11ab0519096818ad028545e6da SHA-1: 41274fc1577bd190b17743d5ee99c35bfcadb302 SHA-256: 7be8af258f67de048523808d882ce726b6277c837cd1a3fe728f936550c91507
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, masquerading as 'risk management books pdf', which are designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=risk+management+books+pdf, which is flagged as a known malicious redirector. The document body itself is heavily obfuscated and contains the malicious URL, suggesting an attempt to disguise its true purpose. The presence of many Shopify-hosted PDF links, while some are benign, contributes to a link farm strategy to improve SEO for 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=risk+management+books+pdf
    • http://files.irene-vassos.com/uploads/1/3/0/8/130814208/6711595.pdf
    • http://files.oceanetic.com/uploads/1/3/0/7/130776200/miroxal.pdf
    • http://lujafedi.fullyrawlabel.com/uploads/1/3/1/4/131437657/5971874.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7260/9686/files/kokasufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/55161745968.pdf
    • https://cdn.shopify.com/s/files/1/0430/1609/3849/files/tilopujunubulelexon.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/75287505381.pdf
    • https://cdn.shopify.com/s/files/1/0435/1184/0927/files/6764749370.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7574/files/noxogina.pdf
    • https://cdn.shopify.com/s/files/1/0434/5266/1912/files/felajivutupojagamevefiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/10_percent_luck.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3294478915.pdf
    • https://cdn.shopify.com/s/files/1/0432/7482/9987/files/jegebopobamedinoruxedodow.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/sons_of_anarchy_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5621/files/xibogujirewuwapera.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_off0000bafc.bin
ab6b9f20065517d1cf3544659e88070736d2ab12b7f368ba82475f1df75488c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAFC 5444 bytes
font_01_sfnt_off0000cd79.bin
76652c6300792ab5e06d65cfdbb46db346f08d3d8c453399e95d55fa6c190b78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD79 10452 bytes

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