Malicious PDF — malware analysis report

Static analysis result for SHA-256 056dcdb59de08b28…

MALICIOUS

PDF

55.9 KB Created: 2020-08-01 17:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a97143c2a6429ebe8817b5bde7531317 SHA-1: 785118357b9041b73d1ad7e5506e50c76d7c0039 SHA-256: 056dcdb59de08b285dc7978a73ee7f537b32962ab6b57dd8150f0cfbfa426b92
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a known malicious URL, likely intended to trick the user into visiting a phishing or malware distribution site. The presence of numerous other PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to obscure the malicious destination. The ML classifier also strongly indicated maliciousness.

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=stardew+item+codes
    • http://files.blueagavebarcom.com/uploads/1/3/1/4/131437423/wumot.pdf
    • http://files.staceygschwartz.com/uploads/1/3/2/6/132682819/b5fe75b.pdf
    • http://files.physicsfox.com/uploads/1/3/0/8/130873908/mamazigen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4918/7493/files/pepawonoxufenagifigapodu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7443/7791/files/gogupevinekuzajuronated.pdf
    • https://cdn.shopify.com/s/files/1/0437/8106/2805/files/lejojifom.pdf
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/josimevojukepupilipe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/julanefiwozuxam.pdf
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/32391782667.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54686169254.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/ronalepobilap.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/13441231748.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/and_vs_or.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/12522497738.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/90435798869.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/fotesafosezobokodapemevad.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_off000093fd.bin
b7299643e441cd57aa59530abab175726ca6d243a0a0593ff0f77c8f0569618e
pdf-font-stream PDF embedded font (sfnt) at offset 0x93FD 5248 bytes
font_01_sfnt_off0000a5ce.bin
385478033a07cb5c41026c09aa94b05aa5f6fe1f99765e8b2c95fac0baea5048
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5CE 14656 bytes