Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58f70eb9d901e42…

MALICIOUS

PDF

32.7 KB Created: 2020-08-25 04:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9be6e04788a28bbc08383e4a4a99f2d8 SHA-1: f4fd005026bf739805f9ef7df8155521f4dc3259 SHA-256: d58f70eb9d901e42b14ec047c0895228c8c067d9cd277c800fd141e1979ba97c
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=cbs+local+program+guide'. While no scripts were extracted, the sheer volume of embedded links and the ML classifier's high confidence indicate a malicious intent, likely to lure users to malicious content or for SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=cbs+local+program+guide
    • http://files.thehivedanceco.com/uploads/1/3/2/6/132680869/rizukajopabilekopaf.pdf
    • http://vezesi.helpinghandsrescue.org/uploads/1/3/2/8/132815806/dizaku_webeto_dimokekipune_tones.pdf
    • http://megetu.nwpwellness.org/uploads/1/3/2/6/132695829/9909082.pdf
    • https://cdn.shopify.com/s/files/1/0429/3984/2719/files/probability_sample_space.pdf
    • https://cdn.shopify.com/s/files/1/0433/6294/3144/files/xikexegawizapukojuxoga.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1315/files/pifetasusikekebul.pdf
    • https://cdn.shopify.com/s/files/1/0462/7254/4917/files/pixalinemuvijasuwekiso.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/xumekedakopamemofeguf.pdf
    • https://cdn.shopify.com/s/files/1/0438/4735/2480/files/47732973084.pdf
    • https://cdn.shopify.com/s/files/1/0434/6344/2598/files/xizuz.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_off000041ae.bin
4d419254a2e6abc1066b13014a80acd7e51398a21290fcf9eb30b573fd9c5d2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41AE 5436 bytes
font_01_sfnt_off00005408.bin
9c4ac27979f3a9036323134d1d1dc476c1e93cfee437684e7f38a77d73cd8750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5408 10168 bytes

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