Malicious PDF — malware analysis report

Static analysis result for SHA-256 068fb3289fdbecbc…

MALICIOUS

PDF

34.3 KB Created: 2020-08-06 02:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20c85c237ff14901ee2479156b6cb420 SHA-1: b6b70966904414ebbd7553e7cae13c143ec7efdf SHA-256: 068fb3289fdbecbce268a737901cddfb9d1973f4395c9c45105a5fbe976b34d3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, 'https://ttraff.ru/pify?keyword=astrology+for+the+soul+pdf', is flagged as a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious 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.ru/pify?keyword=astrology+for+the+soul+pdf
    • http://files.cromartieart.com/uploads/1/3/1/8/131856757/jutoker-febevav-gesofafifaso-fikerajize.pdf
    • http://fomanew.vipercussion.org/uploads/1/3/1/6/131637881/tolipimibaju-gifipitowudefim-zowovux.pdf
    • http://mekugib.davishouseofcatering.net/uploads/1/3/2/6/132696323/zititolagesomupa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6277/8263/files/12977796833.pdf
    • https://cdn.shopify.com/s/files/1/0436/0372/2402/files/likajejofulofogasa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/51088747679.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2346/files/la_bella_e_la_bestia_libro_originale.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kexuxedixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1011/3188/files/50423395456.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/47125755779.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1969/files/wijatagamime.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_off00004712.bin
f59f01c2030b944601e65e4dafe133eb9f73bf3f91da1b01dcde3de6a3e6b3a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4712 5184 bytes
font_01_sfnt_off000058bd.bin
21ff1af227c7995efd29a702cfd9ffe507c3d08d1e7374b038823cbd0b023c69
pdf-font-stream PDF embedded font (sfnt) at offset 0x58BD 10576 bytes