Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8609a5a2738254…

MALICIOUS

PDF

47.1 KB Created: 2020-09-12 01:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 036b41c886ec067975f2239243ac928c SHA-1: 79f0a160b63bcebc8aaa4eb30e52afc758a462b8 SHA-256: 1e8609a5a2738254a44f3cbaf5f642b1e6648a7723bda8d88e14d4f17a115b74
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a health-related document. The primary heuristic indicates a link to known malicious redirector infrastructure, specifically `https://ttraff.me/pify?keyword=nhs+back+pain+exercises+pdf`. The document also contains a large number of external PDF links, many hosted on `cdn.shopify.com`, suggesting a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the presence of a malicious redirector URL is a strong indicator of a phishing or malware delivery attempt.

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.me/pify?keyword=nhs+back+pain+exercises+pdf
    • https://cdn.shopify.com/s/files/1/0464/6846/4792/files/lopananalirirep.pdf
    • https://cdn.shopify.com/s/files/1/0430/6436/1113/files/11529516778.pdf
    • https://cdn.shopify.com/s/files/1/0435/2193/3466/files/tiwodunodumajudokov.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/nutorem.pdf
    • https://cdn.shopify.com/s/files/1/0434/1651/8805/files/bandlab_link_analog_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/9685722968.pdf
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/35807613946.pdf
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/biogas_benefits.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/zotaxonezafuravivamawubo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3109/files/99556289678.pdf
    • https://cdn.shopify.com/s/files/1/0436/5769/1289/files/math_test_answers_funny.pdf
    • https://cdn.shopify.com/s/files/1/0434/1560/1314/files/46591518967.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_off00006dc0.bin
d4c3725226fef28f98de7988d1217795136d3f6386d4c9ed9dc1f8e14045ff91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC0 5048 bytes
font_01_sfnt_off00007ecb.bin
2211278a308d9a98858d48b831fd980da419c6af201b232d28dc2ff7d3b0b161		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECB 10304 bytes
font_02_sfnt_off0000a1e3.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E3 4324 bytes

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