Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a9ebe143864c6e…

MALICIOUS

PDF

54.7 KB Created: 2020-07-22 07:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0cc9c75b3a0358477a65a9847b608c4 SHA-1: 3161b8fa7e93db4214a85fd32385cc38a56e8bb5 SHA-256: 13a9ebe143864c6e72e76a05dea8f1df764e00c8d9d4f0b8c1c82bec49ff30e5
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, masquerading as a recipe, which are designed to redirect users to external websites. The primary malicious link identified is `https://ttraff.ru/pify?keyword=chicken+fried+rice+recipe+in+malayalam+pdf`, which is flagged as a known malicious redirector. The document's structure and the presence of numerous outbound links suggest an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=chicken+fried+rice+recipe+in+malayalam+pdf
    • http://files.realdisciple.org/uploads/1/3/1/0/131070192/vobilikax-leninepelano.pdf
    • http://files.ddssullivan.com/uploads/1/3/1/3/131383333/814cf0df42.pdf
    • http://files.meettheauthorpc.com/uploads/1/3/0/8/130873903/kiweg.pdf
    • http://files.whynotcatholicism.com/uploads/1/3/1/3/131383661/roparuf.pdf
    • http://files.rivervalleypc.com/uploads/1/3/0/7/130775268/pemipojefuviz_jabup_vapajekixudu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tizerosotusalasebix.pdf
    • https://cdn.shopify.com/s/files/1/0432/3812/9823/files/japuxugonaxerimelukugozi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/65327047340.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87743453122.pdf
    • https://buvatabowu112119772.files.wordpress.com/2020/07/72542630425.pdf
    • https://mumiwarifiza.files.wordpress.com/2020/07/tidasujiwepusomurekevefad.pdf
    • https://zezofirot.files.wordpress.com/2020/06/53137264233.pdf
    • https://ketadotab117676792.files.wordpress.com/2020/06/44387052774.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/4816012618.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vevisip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97285982277.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/52511976281.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/78682367570.pdf
    • https://cdn.shopify.com/s/files/1/0437/2050/7546/files/zabasawol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7446/1589/files/jopafibefubofugoka.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/70353258292.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7206/files/gagebif.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_off00009230.bin
dd5142a14e0661bba55152ac3066bee02b02d890896411fe195cecb06114de0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9230 5004 bytes
font_01_sfnt_off0000a2fb.bin
b72d70c7d732d5584843256519b43ab02b68a573d4964ae65d4a0589bf2b1d3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2FB 12872 bytes

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