Malicious PDF — malware analysis report

Static analysis result for SHA-256 a83af4524c9cc6f6…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 23:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bfdc9a3ca5119b032d26ce686f3c917 SHA-1: 237a7d41930b1ea77db8f9418d346cc78878f87b SHA-256: a83af4524c9cc6f650dac179a8b46d772dac8dfc9232715e762b254acc52202a
120 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.me, which is presented in the context of 'Volvo penta 290 dp parts'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to drive traffic to this malicious domain. No scripts were extracted, and the PDF structure itself does not indicate further exploitation beyond the malicious links.

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/wix?keyword=volvo+penta+290+dp+parts
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/66031241041.pdf
    • https://cdn.shopify.com/s/files/1/0449/8876/0232/files/autonomous_rc_car_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://cdn.shopify.com/s/files/1/0438/9103/2216/files/zudiw.pdf
    • https://static.usrfiles.com/ugd/724bd4_300224e46ea74fc098d71a09fc65c166.pdf
    • https://static.usrfiles.com/ugd/b8c837_68d2c8855b2a4a2b8bc2f4f02c9fc655.pdf
    • https://static.usrfiles.com/ugd/b8c837_05541944863e4a8cb301cb6a7e10482f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3faba924c5144b0899bbc2da6b149b6.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/algebra_2_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/93934122807.pdf
    • https://cdn.shopify.com/s/files/1/0437/1985/2200/files/8_millennium_development_goals_of_ethiopia.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/vewar.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/jukesa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/jizafififukunamulowi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3916/9429/files/30856405275.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/sobol.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/gomipixomun.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/
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/jukesa

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005667.bin
39794861c4c31596f8c444649d95d7c23dacbf28f88633b269a626fcfdf6d3f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5667 5408 bytes
font_01_sfnt_off000068db.bin
5de44d3edec09404652b62d50373d7a75c3864ee79eb7a0ba0acc02dcc3a3e99
pdf-font-stream PDF embedded font (sfnt) at offset 0x68DB 13228 bytes