Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbc425a56fe9142…

MALICIOUS

PDF

48.8 KB Created: 2020-08-29 21:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6232e1eda994148ca2046037215271e SHA-1: 2bb4d9dbcd630d880abbfc3eef8a8f3dcdd091cd SHA-256: 0dbc425a56fe914259042f023c8ea972eaf49bc85521a06207a1df99c2f32403
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. This URL is used in conjunction with a large number of other URLs pointing to Shopify-hosted PDFs, indicating a link farm likely used for SEO manipulation or to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=twilight+struggle+scoring+cards
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/98995036502.pdf
    • https://cdn.shopify.com/s/files/1/0439/1757/4299/files/60541905034.pdf
    • https://cdn.shopify.com/s/files/1/0431/6872/7194/files/16114025821.pdf
    • https://cdn.shopify.com/s/files/1/0438/3549/0466/files/attachment_theory_article.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/3619261249.pdf
    • https://cdn.shopify.com/s/files/1/0428/5267/9836/files/love_flower_images_hd.pdf
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/ctet_dec_2019_form_last_date.pdf
    • https://cdn.shopify.com/s/files/1/0435/4483/8303/files/71130456108.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/rabemidajofepi.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6fa9a903a1f4da1a6b4070563175ce3.pdf
    • https://static.usrfiles.com/ugd/b8c837_936e6d706b1745e681c286eb4167454a.pdf
    • https://static.usrfiles.com/ugd/b8c837_61bad3644f934a5d853a47703719c7e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_cdeea24ea27f4720a59cad1fc6193a53.pdf
    • https://static.usrfiles.com/ugd/ac72e0_9aba7ccc96e9497ca799104c6a9bc65e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b139f2e832534566ba572c359f306460.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ead4e8c8306479ab4a774814528b582.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_off0000802a.bin
8c9c7b4be1ca3968952816c95e1ed0de4523c03893845d611ca442181e93aa87
pdf-font-stream PDF embedded font (sfnt) at offset 0x802A 5240 bytes
font_01_sfnt_off00009202.bin
d4a2206ac260a34c889df1aea7780b6df54f810317207d6d6e042221298490d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9202 10656 bytes