Malicious PDF — malware analysis report

Static analysis result for SHA-256 2877dfa1fe2cfd39…

MALICIOUS

PDF

44.5 KB Created: 2020-08-08 05:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 782e30a4d5792f3f964518f1f32e9da0 SHA-1: 72bb2269bde0babe0c11914cf841628972fe6159 SHA-256: 2877dfa1fe2cfd393b0e0180749d3ebb25312c840460ce597f9325fbb1eb7455
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to shopify.com domains hosting PDF files, suggesting a link farm for SEO poisoning or phishing. One critical heuristic identified a link to a known malicious redirector at https://ttraff.cc/pify?keyword=basic+english+synonyms+pdf, which is likely the primary malicious payload delivery mechanism. No scripts were extracted from this sample.

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.cc/pify?keyword=basic+english+synonyms+pdf
    • http://files.thinkaboutouroceans.org/uploads/1/3/0/7/130740573/6b4abbb0fbb49.pdf
    • http://files.theblackcownewspaper.com/uploads/1/3/1/4/131407029/969d28.pdf
    • http://files.atlaslincoln.org/uploads/1/3/0/7/130776001/2385120.pdf
    • https://cdn.shopify.com/s/files/1/0428/8164/6758/files/windows_10_the_missing_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7097/1299/files/94171679586.pdf
    • https://cdn.shopify.com/s/files/1/0435/6043/5871/files/bimovawivovi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6145/8597/files/9508753658.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/xonibekaga.pdf
    • https://cdn.shopify.com/s/files/1/0446/9719/0556/files/doterra_probiotic.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/rimajajosogavesaxakokazuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65529241957.pdf
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/lotilozuxobukuvumasevusat.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/legadenukokaripugagig.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/vocabulary_words_for_ielts_writing_task_2.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_off00007052.bin
45badebaf68e460ad4b4c5d5686f6b6cfe04f3ee604766a18ea7dcd3a058c0e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7052 5624 bytes
font_01_sfnt_off0000835b.bin
645905c709a71f8be992ab581c78539a23956ec6e34eabdc9793a92967287c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x835B 9824 bytes

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