Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1f33b291b6b067…

MALICIOUS

PDF

43.9 KB Created: 2020-08-11 19:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a340c00d659acfcfc171b9b8be9ac5e SHA-1: dbbb9c3294faeddec8cd55a1311d9d27322b8c8f SHA-256: 2c1f33b291b6b067a24a862c4e057daa6718888f7deff5dd6962eab096b4c744
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDFs hosted on various domains. One critical heuristic firing indicates a link to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though corrupted, contains the same URL, suggesting the primary intent is to redirect the user to malicious content. No scripts were extracted from this sample.

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/pify?keyword=common+idioms+in+english+with+meanings+pdf
    • http://files.wildcatrollerhockey.com/uploads/1/3/2/8/132815343/fedarup-zajamadef.pdf
    • http://kapaxaw.mrspittorinosclassroom.com/uploads/1/3/1/4/131438667/simogi-rewetonero-numusew-nubabapuwenezus.pdf
    • http://files.notquitenans.com/uploads/1/3/0/7/130739678/mularu-biruzunefewapaj.pdf
    • http://files.smallsmusiclab.org/uploads/1/3/0/7/130738562/tekipolorurogozegax.pdf
    • http://files.daytonsockcompany.com/uploads/1/3/1/1/131164236/vawano-kesupapo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3929/files/57722449644.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/38520491737.pdf
    • https://cdn.shopify.com/s/files/1/0436/1699/3440/files/soxosesopoxagale.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/39238116749.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9756/files/guresetetilaxifudira.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/guxugozominuwelofesobap.pdf
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/68407070145.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/56014177123.pdf
    • https://cdn.shopify.com/s/files/1/0435/9690/6659/files/sojewox.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/wire_rope_users_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5813/files/ruwoku.pdf
    • https://cdn.shopify.com/s/files/1/0432/4196/3683/files/59511314791.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/kerupolekimojilepul.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e15.bin
d7f6295015fb418e07080a3e2d1d3ebff6a2acb121f1c340cb69402c188ef76b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E15 5356 bytes
font_01_sfnt_off0000803b.bin
fb82743417bbbae7fd63ac2d79c821c5ff1950b3bb6eb5376459eff92b83a600		 pdf-font-stream PDF embedded font (sfnt) at offset 0x803B 10028 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.