Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fde558bfd549c7…

MALICIOUS

PDF

50.4 KB Created: 2020-08-06 15:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce72a189853643f8b7e04c3122782b0e SHA-1: 0e7c961969d0d560d8b3a01ae063a1ceb2a681cc SHA-256: e7fde558bfd549c7f31724320ebc4afdecc01b269b5ce19f4f19ea9c4b525c59
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, with one specifically pointing to a known malicious redirector infrastructure at ttraff.com. The document body, though partially corrupted, includes the same URL, suggesting a lure to external content. The presence of a large number of PDF links, many hosted on shopify.com, indicates a link farm designed to distribute malicious content.

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=miop%25C3%25ADa+hipermetrop%25C3%25ADa+y+astigmatismo+pdf
    • http://files.carriegarrott.com/uploads/1/3/0/7/130775123/1de17.pdf
    • http://files.isateamenergize.com/uploads/1/3/0/7/130738615/600ae57.pdf
    • http://files.curiouscreativecritical.com/uploads/1/3/1/0/131070072/8991190.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/jelifokidilifutofekituf.pdf
    • https://cdn.shopify.com/s/files/1/0428/4838/7239/files/50500857707.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/pamunadum.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/spurt_of_blood_artaud.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8455/files/14938778313.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8695/files/23278342934.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/kivebosiwegajarumafogidux.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/guvuw.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/liwelobijof.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/guia_ceneval_ingenieria_industrial.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_off00008387.bin
d3696631db9350f0db1b02cc15932de274b987d3da45f2f7ac42ad0caa5268f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8387 5584 bytes
font_01_sfnt_off00009677.bin
ae7bf970df76d9d661f49d3175381797bb8b6ac60b11675258088f3e56c34518
pdf-font-stream PDF embedded font (sfnt) at offset 0x9677 11216 bytes