Malicious PDF — malware analysis report

Static analysis result for SHA-256 068ba4282c68cdf9…

MALICIOUS

PDF

40.8 KB Created: 2020-09-13 04:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00ebcfc8637723d7437ae3a3b7cee891 SHA-1: 28883916a529216ebebaeeb1e4fe2f0f123a158f SHA-256: 068ba4282c68cdf98c66218979ed4ede7f39baed5b686b228dc9ba4b94001cf7
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 a link farm designed to distribute SEO spam. One of the primary links directs to a known malicious redirector, suggesting the document is part of a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=similar+triangles+applications+worksheet+answers
    • http://kikokir.therosievida.com/uploads/1/3/0/8/130814515/lizetasob.pdf
    • http://wipikuw.stpatrickscatholicpreschool.org/uploads/1/3/0/7/130740151/b7305c36d20649.pdf
    • http://rurazo.zoneadvisory.com/uploads/1/3/0/8/130813669/finom-tuzisogepixozoj-dezibaxepib.pdf
    • http://gadepe.100wwcfranklincountyvt.com/uploads/1/3/1/0/131070442/jesajofalutuvi.pdf
    • http://jemazozan.travelvideofi.com/uploads/1/3/1/1/131164159/rukifuzidi_jutufakevilen_gumobanavafovop.pdf
    • http://files.urbanreach.com.au/uploads/1/3/1/3/131381277/a945082.pdf
    • http://xazosi.reinhardtbproductions.com/uploads/1/3/1/6/131636772/wowowidomu_forinepizeru_telosarotenol.pdf
    • http://files.rmsraiders.com/uploads/1/3/0/7/130739452/8d2d61.pdf
    • http://fowum.christenenos.com/uploads/1/3/1/4/131437363/4738751.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/8a9bcc_ae41f92cf5a346a2ae83b4ad15834811.pdf
    • https://static.usrfiles.com/ugd/72216b_9c81ce1a40094611a35f52147d426420.pdf
    • https://static.usrfiles.com/ugd/956c05_d368538dd2d44d13b1aa543203bc10d3.pdf
    • https://static.usrfiles.com/ugd/99965f_093f185db14b4f1496cf3d7914a2e02c.pdf
    • https://static.usrfiles.com/ugd/79cb75_380ee2bdf697408fb9924095d1c64507.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_off0000606f.bin
ed7df33bd8a9f825723571c74bb46cb7e24e346dcb2a3aeac37be6352f567bf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x606F 5604 bytes
font_01_sfnt_off00007362.bin
cc87f16e7ad3df70e3dcfec08dee47bae66d28040270c20e2e2b96f8af978bed
pdf-font-stream PDF embedded font (sfnt) at offset 0x7362 10184 bytes