Malicious PDF — malware analysis report

Static analysis result for SHA-256 864fedd29fe4794b…

MALICIOUS

PDF

41.4 KB Created: 2020-08-12 05:35:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30cf0e55433ea88b8eb93dc85923e568 SHA-1: 6a21379a008448235dd50734c47061af7fc677f2 SHA-256: 864fedd29fe4794b4835b32938e8ce17b46755031bc37cde37428e86f0521ebb
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a link farm or phishing attempt. The document body text and embedded URLs indicate a lure for a 'free download' which likely leads to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to further malicious sites or downloads.

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=the+abundance+book+pdf+free+download
    • http://bexozozaw.981themarcoislandfm.com/uploads/1/3/1/4/131482975/tafose.pdf
    • http://files.tiffanyfewel.com/uploads/1/3/2/6/132682820/gixewasamumorex.pdf
    • http://files.hoopcubed.com/uploads/1/3/0/7/130775825/veviriw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/jadikuxidi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5402/3327/files/joxofemanapenuka.pdf
    • https://cdn.shopify.com/s/files/1/0435/1236/5211/files/fivujoxarupejibegu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/83325361955.pdf
    • https://cdn.shopify.com/s/files/1/0429/7093/9541/files/14361629698.pdf
    • https://cdn.shopify.com/s/files/1/0430/3241/2311/files/60980286356.pdf
    • https://cdn.shopify.com/s/files/1/0435/6141/8913/files/nisifugixax.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/90360043112.pdf
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/9982708091.pdf
    • https://cdn.shopify.com/s/files/1/0430/9273/8201/files/dexediluvizegor.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/63212581997.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000557c.bin
8f7e02d1848b40bed281276fb2530a7653b2e561a08dddc3fc16bf90797f4738		 pdf-font-stream PDF embedded font (sfnt) at offset 0x557C 5064 bytes
font_01_sfnt_off000066a8.bin
998b129399f7e46433961e8425d83347a474aebf50ae7e6ecc224b972c31e82b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A8 10580 bytes
font_02_sfnt_off00008ab5.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB5 4324 bytes

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