Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad5f7b602eb08f3…

MALICIOUS

PDF

39.4 KB Created: 2020-08-30 03:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6547a793eaa57739889936a0313ff798 SHA-1: 2c10f1745374cb9f00148b382351e390062a2491 SHA-256: 6ad5f7b602eb08f3c4833a1331e9bced7ba57877fdbaa1700b6d972d4ed2c420
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL designed to lure users with a film download lure. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a link farm, with many embedded URLs pointing to external PDF files. This suggests an attempt to drive traffic to malicious infrastructure, likely for phishing or malware delivery.

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/wix?keyword=uzun+hikaye+film+indir
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/76de1a_9614f4c37af147fdaa4eeed219f9cfca.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_8c76e82abdb9460aa1927576b05a719a.pdf
    • https://static.usrfiles.com/ugd/eda9ba_3033eb90cbf14f2c88a9ca463d25c47c.pdf
    • https://cdn.shopify.com/s/files/1/0430/7153/7301/files/product_brochure_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0446/6475/0243/files/warhammer_40k_8th_edition_deathwatch_codex.pdf
    • https://cdn.shopify.com/s/files/1/0429/5367/0822/files/solar_system_gif_free.pdf
    • https://cdn.shopify.com/s/files/1/0447/3444/7770/files/guide_to_investing_robert_kiyosaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/gezawirupajibuloxenuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb5060f414fa44a087299213ea30f6b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_59c9c5dfc8b14c0b906900b86974965c.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_off00005c44.bin
613660b13af63381d68b48676c833d57423e085e919072fa7938b3e6da5d0851
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C44 5176 bytes
font_01_sfnt_off00006dc3.bin
10fd0dfaf0be3e17db66828ac289ac01db2ab551ee01be57908646b04227028b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC3 11148 bytes