Malicious PDF — malware analysis report

Static analysis result for SHA-256 077c96aaa9311dc5…

MALICIOUS

PDF

39.9 KB Created: 2020-08-23 04:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56e9f6e73ffb2b92fb5f54302ed85de5 SHA-1: 35a3089c77d00692ffcd92cb2177d3134aaabaa5 SHA-256: 077c96aaa9311dc50d52427b985ee731b842c6ef7924666a7192f6caad3aa1ff
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=africa+competitiveness+report'. This indicates an attempt to redirect users to potentially harmful content, disguised as a competitiveness report.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=africa+competitiveness+report
    • http://files.govmation.net/uploads/1/3/1/1/131163777/5123569.pdf
    • http://files.cavaliercrazyrescue.org/uploads/1/3/0/7/130739076/kopuruto.pdf
    • http://files.affirmationsandinnovations.com/uploads/1/3/1/6/131606874/4859404.pdf
    • http://zavisexol.profgracie.com/uploads/1/3/2/8/132815732/jibujujarijidopaman.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0465/6797/files/97429901725.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakudegebemufajetexu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/21276289531.pdf
    • https://cdn.shopify.com/s/files/1/0446/9823/9132/files/tcs_email_writing_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/metroid_prime_2_rom.pdf
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/weekly_hourly_planner_printable.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/psp_emulator_android_requirements.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f58.bin
be4e52632edc078d9d4a558da41766003e0d046a9ececc43ae8589d0b444cf81
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F58 5180 bytes
font_01_sfnt_off000070e1.bin
74f4084f9844c45c61163b577777cad07328e255563a07214172df51a5c7e761
pdf-font-stream PDF embedded font (sfnt) at offset 0x70E1 10080 bytes