Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c986be87e631832…

MALICIOUS

PDF

67.1 KB Created: 2020-08-07 15:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cddbedb238400644ff9c21339f5ecaa0 SHA-1: d2b087a10c9039087a5e03eefd6ae93bc19a9c8c SHA-256: 4c986be87e631832d0add9661ea4b1b8176bd2ab5092ace687983244de41eaba
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to 'axial flow compressor design pdf' and the malicious URL, suggesting a lure to download a seemingly relevant document. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or SEO manipulation tactic to attract victims.

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.com/pify?keyword=axial+flow+compressor+design+pdf
    • http://files.ninapowell.org/uploads/1/3/2/6/132696580/3258759.pdf
    • http://files.cavershamholistics.co.uk/uploads/1/3/2/6/132681951/8863419.pdf
    • http://files.basketnineteen.com/uploads/1/3/1/3/131378771/lelap.pdf
    • http://files.toastytunes.com.au/uploads/1/3/0/7/130738971/gosokoni_nawenagikimega_dunebuzo_viroko.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/breast_cancer_journal.pdf
    • https://cdn.shopify.com/s/files/1/0436/5680/6553/files/51002362186.pdf
    • https://cdn.shopify.com/s/files/1/0430/3886/7607/files/17610480771.pdf
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/57383358725.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/sitiri.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/mimadonejexabife.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/54226687784.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/2912502763.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gerakofidasetivivirodipel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0908/0477/files/zefaselogak.pdf
    • https://cdn.shopify.com/s/files/1/0429/1048/2588/files/4993853323.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2fa.bin
fbcf6c26d2ab49c48e7cdaaa62464510f4774f3b8e33a84f71f1531ccf4c7cb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FA 5624 bytes
font_01_sfnt_off0000c628.bin
3f5c8b13f081521ccb71d27ed4001fd9dbe3fb588122a616ebcd8aae83f12cfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC628 10576 bytes
font_02_sfnt_off0000ea82.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA82 16036 bytes

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