Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3bd664a3646122b…

MALICIOUS

PDF

42.2 KB Created: 2020-08-12 02:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa27853f145590fd0785b8b02c1b31b9 SHA-1: f4c726c447e262319dc420ca78a59b5ab1b03d91 SHA-256: c3bd664a3646122b9a4e243a903bca4264878e6f9240de9db6dd089b59f1d2a7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link and a large number of external PDF links, indicating a link farm or redirection tactic. The ML classifier also flagged this PDF with high confidence. The primary malicious URL identified is https://ttraff.cc/pify?keyword=dlf+camellias+brochure+pdf, which is likely used to redirect users to further malicious content. The document body is heavily obfuscated and appears to be generated content rather than user-readable text.

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=dlf+camellias+brochure+pdf
    • http://files.polyq.org/uploads/1/3/1/4/131406885/9110095.pdf
    • http://files.leinsterbistro.com/uploads/1/3/0/9/130969548/f57e16b0b79.pdf
    • http://files.sweetblackberry.org/uploads/1/3/0/7/130738696/f187805e9dcb.pdf
    • http://genavuw.kitchengadgetvegan.com/uploads/1/3/1/0/131070109/labek.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5804/files/mumbai_ahmedabad_bullet_train_project.pdf
    • https://cdn.shopify.com/s/files/1/0449/9360/9896/files/sodetikugozupab.pdf
    • https://cdn.shopify.com/s/files/1/0437/9626/7168/files/53882637885.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/nesefinatonaferigakugofar.pdf
    • https://cdn.shopify.com/s/files/1/0428/3164/2780/files/78798995193.pdf
    • https://cdn.shopify.com/s/files/1/0432/3796/5986/files/49194587957.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/fedupek.pdf
    • https://cdn.shopify.com/s/files/1/0430/3385/4103/files/sejiwopizabasopavibo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7828/7513/files/luvevetadilubinojaxalumad.pdf
    • https://cdn.shopify.com/s/files/1/0430/3133/0969/files/45899422664.pdf
    • https://cdn.shopify.com/s/files/1/0434/3208/3612/files/naui_scuba_diver_book.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_off000067bf.bin
4b382c405edba291792ff4653f3583eba7a342ad7230d050a33f95e1f6447cf0
pdf-font-stream PDF embedded font (sfnt) at offset 0x67BF 5532 bytes
font_01_sfnt_off00007a65.bin
6837a5351b7fd171fa925a50fd8336a64bdb4c1516214aefa5b3890ac4a65998
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A65 9844 bytes