Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff359395a0efdeca…

MALICIOUS

PDF

42.6 KB Created: 2020-08-16 23:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6d9bf50704972941914c9ec999ed170 SHA-1: 13d9a20e9038f760d2c8f53ba7577eeb9d829386 SHA-256: ff359395a0efdeca39d5db0df7e9b15fe474c5a81d06ada80a1ea98a44ae7150
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to 'ttraff.cc', are likely part of a phishing or malware distribution scheme. The document body contains garbled text but does include the suspicious URL.

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=chain+roller+guide+tensioner
    • http://jitax.custommadewoodproducts.com/uploads/1/3/0/7/130739664/3433487.pdf
    • http://files.buiebeadz.com/uploads/1/3/0/8/130874647/1717715.pdf
    • http://files.pinheadsquilting.ca/uploads/1/3/1/3/131398333/weteg.pdf
    • http://files.driftlessareawetlandcentre.com/uploads/1/3/0/7/130776407/2997a.pdf
    • https://cdn.shopify.com/s/files/1/0435/2314/5896/files/73108753187.pdf
    • https://cdn.shopify.com/s/files/1/0432/6323/0116/files/factorio_red_science_blueprint.pdf
    • https://cdn.shopify.com/s/files/1/0433/7208/5406/files/xadutetobetikanibunelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0253/5840/files/rukebobolubeluv.pdf
    • https://cdn.shopify.com/s/files/1/0447/4303/2981/files/malaria_parasite_microscopy.pdf
    • https://cdn.shopify.com/s/files/1/0448/2433/0402/files/dopugimezuwomozulepodi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0609/8597/files/2_pedro_hernandes_dias_lopes.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8390/files/51310276782.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/vibamasebujigajat.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004343.bin
f10e6a8c909a38f1fdaa1709ef4d42dffdd612f987edd83d7e797aced4d7d306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4343 2948 bytes
font_01_sfnt_off00004dc1.bin
3435910ec9e069755e3997aa1fc6bd216b50c7e6be8f9c6f658c9a2ae21d7074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC1 4992 bytes
font_02_sfnt_off00005eaa.bin
b54427e7e1aeb0d197a8e3dcc9e611ec7b88c3d85eef3741bd11c99466ff7b0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAA 11756 bytes
font_03_sfnt_off00008627.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8627 16164 bytes

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