Malicious PDF — malware analysis report

Static analysis result for SHA-256 239e71f7b2fbe845…

MALICIOUS

PDF

33.1 KB Created: 2020-08-17 02:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e25f9ec25951b52e4d0f4b3a1a261421 SHA-1: b26176d27292be0dfc4f699ccd4b775f6531d3e1 SHA-256: 239e71f7b2fbe8453f09ab5ed4f67a17f215d2aacbc3976726edb79174043902
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding a large number of external links, many of which point to Shopify-hosted PDFs. The document body, though partially corrupted, includes the malicious URL and other PDF links, suggesting an attempt to disguise malicious activity within a large number of seemingly benign links. 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.com/pify?keyword=teri+akhiyon+ka+kajal+song++video
    • http://files.stardanceprovo.com/uploads/1/3/0/7/130738666/rejila.pdf
    • http://sevurip.anncarragher.com/uploads/1/3/1/3/131398362/pabor_kogebeku_dagijusenojoli_tuvomewikoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/23553418363.pdf
    • https://cdn.shopify.com/s/files/1/0436/7787/6377/files/chamma_chamma_video_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/0718/7872/files/tenancy_agreement_form_uk.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4698/files/19675158411.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/corsair_void_pro_wireless_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/nusene.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/11009677302.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/22430792503.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_off00004451.bin
af93110e62c604f71ae30c5bed405b64b0ec514bb3d73fe947085397f3e860c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4451 5336 bytes
font_01_sfnt_off0000567d.bin
eaafc1851787f37313974d69844a046cd48bf8bc08aa7eccb7985a38e360cff1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x567D 9828 bytes

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