Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ccce1190387c3a…

MALICIOUS

PDF

42.7 KB Created: 2020-08-25 20:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5370d6464ef243eadf56f101f04f5bc SHA-1: 0e313df5556322e07314eb8cf9e02278610ee252 SHA-256: 95ccce1190387c3aa9e9963857b4dd95ce815134fc7dc6a67efa3f9ab14c6983
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous embedded URLs, including a suspicious one pointing to 'ttraff.ru', which is likely part of a phishing or malware distribution scheme. The presence of a large number of external links suggests an attempt to overwhelm security measures or distribute payloads through various channels.

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=4+unit+apartment+building+plans
    • http://bilob.memphisactivismcalendar.org/uploads/1/3/2/3/132303359/773a64322f4.pdf
    • http://bosida.villageinitiativeinc.com/uploads/1/3/1/6/131637284/faaedd66ce068e.pdf
    • http://files.writeonwebb.com/uploads/1/3/1/4/131483249/retasibakume-roxalupirefoz-nikudopul.pdf
    • http://sefobuj.nicholasmongiardocooper.com/uploads/1/3/1/4/131482995/xisew.pdf
    • https://cdn.shopify.com/s/files/1/0438/7618/8315/files/bajazewirixavekitox.pdf
    • https://cdn.shopify.com/s/files/1/0433/5245/7369/files/aquatools_sand_filter_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/3136/3747/files/baccharis_coridifolia.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/kemutomuwilulagenu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/lasiraranemipurojapixen.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/19691151308.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3074/files/50662434923.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/acidosis_metablica_hiperclormica.pdf
    • https://cdn.shopify.com/s/files/1/0429/0173/3542/files/minecraft_maps_1._8._8.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/50198070938.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/1139889645.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/60705040994.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97503793953.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/90690588565.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000657d.bin
9cfaf7c0aeee3ec8924ec42ba345d4044fc3b6781ab9ddd684ed088951810645		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657D 5412 bytes
font_01_sfnt_off000077ba.bin
7bd8a63949f2ef3f11c5159b09a67a6c17ae237edf4f7d8648b96945c921f734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BA 10920 bytes

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