Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0cb11f187c9373…

MALICIOUS

PDF

37.9 KB Created: 2020-08-11 00:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f678d32edce95d1acdb5ac43ee523df8 SHA-1: 9ab53598b4b0c22c0afec62e9420761b114752c0 SHA-256: 2d0cb11f187c93731b146299f5ef4e5fba120ae72e36e4dc1ddb1b35fd0000f5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting it is the primary lure.

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=alfonsina+y+el+mar+roland+dyens+pdf
    • http://files.catonthecorner.com/uploads/1/3/0/7/130775143/8041afee9d096.pdf
    • http://files.fyffecollection.com/uploads/1/3/1/8/131871605/b079032f22a4bf.pdf
    • http://files.ayatechnologies.net/uploads/1/3/1/3/131398461/divukudubi.pdf
    • http://files.schatziesevents.com/uploads/1/3/0/9/130969656/bavabiteveve_bineladurogat_womujotanib_wilobem.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/cpa_reviewer.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/redabil.pdf
    • https://cdn.shopify.com/s/files/1/0432/2718/5309/files/70825217888.pdf
    • https://cdn.shopify.com/s/files/1/0428/5304/0295/files/goxoparojajomunob.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/vatilolikuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/unchained_melody_righteous_brothers_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/15576578605.pdf
    • https://cdn.shopify.com/s/files/1/0428/5261/4311/files/jamozat.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/50958034832.pdf
    • https://cdn.shopify.com/s/files/1/0447/4486/7994/files/black_and_decker_hedge_hog.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a84.bin
80ce46ae419f90ea1e03c0bd880e889a5461bae93fb2e43964c2b34e58436578
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A84 4988 bytes
font_01_sfnt_off00005b61.bin
cab4a9de1cad253bcc4e6e3f77521854ff662755a8d77280d16feaa245c98600
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B61 9764 bytes
font_02_sfnt_off00007cd2.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD2 4324 bytes