Malicious PDF — malware analysis report

Static analysis result for SHA-256 f81ecea47dbcf0cb…

MALICIOUS

PDF

39.8 KB Created: 2020-08-30 09:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8774a60d49091a6668c8e7a349fc6ce8 SHA-1: 5e16cc0e4920cc200391ee75ee518c51acc818f6 SHA-256: f81ecea47dbcf0cbc72f99aeaa441999c5b0368f8c1887bd0090b5e15c076eb0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to 'demonstrative adjectives worksheets grade 7' and the malicious URL, suggesting a lure to disguise malicious activity. The presence of many external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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.com/wix?keyword=demonstrative+adjectives+worksheets+grade+7
    • https://cdn.shopify.com/s/files/1/0431/9199/2481/files/68283781568.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/438509929.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1949/files/character_traits_reading_passages.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/panimofitozipa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/ethical_hacking_wikipedia.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2c5a85e7d914d51874f5f06e3ff03dd.pdf
    • https://static.usrfiles.com/ugd/34ec99_4d13dbb5997148d9b6070f0d1cd4074f.pdf
    • https://static.usrfiles.com/ugd/d94ae5_96aa30e04048456ca90b603d1ace2bdf.pdf
    • https://static.usrfiles.com/ugd/fe83c3_27f1199b0a05448cad61aceaeaa9522a.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_60c52c18ac314ec1bd6534ddb8b469d5.pdf
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/59388095392.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46287179129.pdf
    • https://cdn.shopify.com/s/files/1/0428/5041/8847/files/madiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5811/9334/files/dotaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/suton.pdf
    • https://cdn.shopify.com/s/files/1/0430/6160/8599/files/magnificent_seven_tv_series_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8491/4583/files/mipinejigipusodobozog.pdf
    • https://cdn.shopify.com/s/files/1/0431/8593/0389/files/41154366023.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/caminante_y_su_sombra.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_off00005c5c.bin
baf26234e078bbbb41a5193cc20ec9738f3a4ab1d70d3dd19b93cfa84911b73d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5C 5692 bytes
font_01_sfnt_off00006fb9.bin
7e1aed85cd0895b8e10a6f0b3fde752a456368458ec1b1078e30090368762499
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB9 10044 bytes