Malicious PDF — malware analysis report

Static analysis result for SHA-256 079a6096977eab6a…

MALICIOUS

PDF

94.8 KB Created: 2020-09-01 09:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 091fb09cb6672606d30feafa13237662 SHA-1: 0c76bc47df1a1d75bf4ad075df4c8b0ee528016c SHA-256: 079a6096977eab6abe3001c71f1deb2c21e10edd107f5c112deb8589a8ff4b36
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a document about "anodizing aluminum process". The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, also contains the malicious URL, suggesting an attempt to drive traffic to malicious infrastructure.

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.ru/wix?keyword=anodizing+aluminum+process+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9818/6663/files/filipino_appetizer_recipes_with_ingredients_and_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2389/files/apple_bobbing_cauldron_eso.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/goradarapazegi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5265/2961/files/oxford_bookworms_library_level_1_the_wizard_of_oz.pdf
    • https://static.usrfiles.com/ugd/b8c837_d48170fc2f3d4ee7b1f0ec795bda5ad2.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_07c259c44bde4c0fa2b1de960d4691d4.pdf
    • https://static.usrfiles.com/ugd/5b604d_b34fa706af844a9aac9b68dfa7b9eec7.pdf
    • https://static.usrfiles.com/ugd/0d002d_04f75bf55c8441faabf4317424851b65.pdf
    • https://cdn.shopify.com/s/files/1/0440/1840/1430/files/7968219786.pdf
    • https://cdn.shopify.com/s/files/1/0435/9841/3987/files/traxxas_slash_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/makalah_retinoblastoma_pada_anak.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a0a.bin
30f247ce30cce0e92ac4dcec62542b2fbe6d93e3fce79b12654c235a300bd182
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0A 5512 bytes
font_01_sfnt_off00012cbe.bin
4d80d34c05d825f9a780bbba452c2dea384246fecda447abe921dad495c99a42
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CBE 13936 bytes
font_02_sfnt_off00015907.bin
6820151f9a4816bccc9e85e605aef44ce22c8924dfcccd161584754f275bf028
pdf-font-stream PDF embedded font (sfnt) at offset 0x15907 16132 bytes