Malicious PDF — malware analysis report

Static analysis result for SHA-256 668aa37635e4576e…

MALICIOUS

PDF

40.5 KB Created: 2020-09-01 05:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4802b3298331949369cade1e24ae682 SHA-1: bfd38b431e1c1040847bf3ae97f2a2c01392586b SHA-256: 668aa37635e4576e2715f9fc9336547b60d9b78f14f252d870a309bf59c34bfa
194 Risk Score

Malware Insights

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

The PDF contains a lure for "Christmas photoshop templates" which, upon clicking, redirects to a malicious URL. This is part of an advance-fee scam, aiming to trick users into engaging with fraudulent schemes. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=christmas+photoshop+templates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_1e801cfe74ae4804bee56ed40a5a27b0.pdf
    • https://static.usrfiles.com/ugd/87fdc7_3928395323c240439af299270cedac10.pdf
    • https://static.usrfiles.com/ugd/b8c837_b40e569cfefd403abacd2e8377f69114.pdf
    • https://static.usrfiles.com/ugd/b8c837_7965b7021d734b74bcf01906dc02aa5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_3eecc460d65b40b39c20558ba37dc838.pdf
    • https://static.usrfiles.com/ugd/625844_a7274f05a70c40108f73a834f6dc39c7.pdf
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/zowezovinosagovori.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/patunimu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/33357592005.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/banomoya_music_video.pdf
    • https://cdn.shopify.com/s/files/1/0447/2933/5962/files/posebufuzob.pdf
    • https://static.usrfiles.com/ugd/0047a4_cc65ce3ee32a43cd9e356b5dc2cc1745.pdf
    • https://static.usrfiles.com/ugd/b8c837_b320d072e39d4329a6c1eada0ae3a01d.pdf
    • https://static.usrfiles.com/ugd/0c4177_ecee3f9ee7b64f269002ff1e23f98acf.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006142.bin
31fd7b1597c7711c4858d4b5fb97cc6861c15b428ee815b7ccd81cf362ffd8ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 4964 bytes
font_01_sfnt_off000071ec.bin
e9c42d1f9fb5997a45378d2be7e65e74d3dd075ac35080c2eb7fd767981976b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x71EC 10308 bytes