Malicious PDF — malware analysis report

Static analysis result for SHA-256 2534ff96742df9e1…

MALICIOUS

PDF

39.8 KB Created: 2020-08-07 14:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c287b482823b4561a3627297c69e8907 SHA-1: 09d800fad87593d85d4a15f668febac8d36d4946 SHA-256: 2534ff96742df9e1773dae3ea2c81404f64f9800a3a8577cd9a9e766dd9cb786
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain. This suggests a link farm used to obscure malicious redirects or to improve SEO for malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=24+hour+time+worksheets+pdf. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector and the link farm heuristic strongly indicate a malicious intent to lure users to harmful content.

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=24+hour+time+worksheets+pdf
    • http://files.shawnmichaelfiedler.com/uploads/1/3/2/6/132681985/2644071.pdf
    • http://files.stewartsghinc.com/uploads/1/3/1/4/131453897/12f0a1629039f24.pdf
    • http://files.destinyjoydesigns.com/uploads/1/3/0/7/130776041/42ab79d1.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/32911439947.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/genodena.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/97483521157.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/22618293109.pdf
    • https://cdn.shopify.com/s/files/1/0432/2669/3789/files/emuparadise_download_workaround.pdf
    • https://cdn.shopify.com/s/files/1/0430/9093/5969/files/66218693457.pdf
    • https://cdn.shopify.com/s/files/1/0429/3568/1180/files/85953148718.pdf
    • https://cdn.shopify.com/s/files/1/0430/6481/9874/files/gusinufojibuxuvosuwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3117/4039/files/350474576.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7913/files/39004900946.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/topopel.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/la_crmonie_des_adieux_simone_de_beauvoir.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_off00005eb9.bin
6621beb3e70ac41486ff74758e56cf6881d0251e77b5901bc9bbd1208fe1ad06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB9 5320 bytes
font_01_sfnt_off000070c5.bin
b29d4b01adbfdbc365747e884cb22da94853acb6ce5e269eee4bd8ba5224ace7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C5 9936 bytes

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