Malicious PDF — malware analysis report

Static analysis result for SHA-256 28815ac13ec01acf…

MALICIOUS

PDF

40.3 KB Created: 2020-08-21 14:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dab004e4441604f44b1daa9e59db3a72 SHA-1: a6dcd30e88d3cf12b738c87e562bc48c66b3545d SHA-256: 28815ac13ec01acfef6c085c137d87ea0dcc8f3e7dfb23bad049ddc32dc972a1
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as a lure for movie dialogues. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same redirect URL and other URLs pointing to Shopify, likely part of a link farm to obscure the malicious destination.

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.cc/pify?keyword=arya+2+movie+dialogues+free
    • http://files.msarredondo.com/uploads/1/3/1/4/131410818/2012795.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/vidufunoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/givofubizitevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6910/files/aristoteles_metafisica.pdf
    • https://cdn.shopify.com/s/files/1/0432/8452/9310/files/bonixilozez.pdf
    • https://cdn.shopify.com/s/files/1/0431/5096/6950/files/80387494029.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/wolovimog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/banon.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/kashi_amarnath_bhojpuri_video_hd.pdf
    • https://cdn.shopify.com/s/files/1/0434/8097/3477/files/rust_oleum_cabinet_transformation_kit_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/15020631460.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_off000046f6.bin
187b525211e6dbb850bba19869e0f38686f917a2e7605d05440e5354c99b75fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x46F6 5508 bytes
font_01_sfnt_off000059ab.bin
556f9f85678e8441e19c4efa9dd54dcd409a84c7b7fa3049c5bcc2b9b3c362a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x59AB 7996 bytes
font_02_sfnt_off00007247.bin
c74b487b2846ce77dcf3081f4472a07fb1303a68a5290bf7dc1440b9588e9342
pdf-font-stream PDF embedded font (sfnt) at offset 0x7247 9908 bytes