Malicious PDF — malware analysis report

Static analysis result for SHA-256 889f16c218eea8b5…

MALICIOUS

PDF

37.0 KB Created: 2020-08-03 01:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d86a0b23457b9127dd771feb0960c9c5 SHA-1: 4a01df14fc861f1cf5831e8c9a4dc3e7803d165e SHA-256: 889f16c218eea8b5ddaf9b37f5a8776c850007cb0c7db5e813fc3fb301c11c0d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=attila+pizza+lyrics'. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious redirector URL is sufficient to infer a phishing or malware distribution attempt.

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=attila+pizza+lyrics
    • http://files.worldpairsangling.com/uploads/1/3/1/4/131453902/9d19ede6.pdf
    • http://files.acasongs.com/uploads/1/3/1/3/131380308/mumukajovizegavefo.pdf
    • http://gatiwow.rytiskonst.com/uploads/1/3/1/4/131406202/lutivupakudap.pdf
    • http://files.skydancer.ca/uploads/1/3/1/3/131379099/joxunimikovati-teduxekitu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/generic_discord_rules.pdf
    • https://cdn.shopify.com/s/files/1/0433/5393/1944/files/mixavomexitu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/rutekiwamuwedonos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2661/9287/files/basanugeravudenurita.pdf
    • https://cdn.shopify.com/s/files/1/0428/8879/0179/files/rajokap.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/37447081435.pdf
    • https://cdn.shopify.com/s/files/1/0431/0184/7708/files/gasebinemafifofe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7961/files/guide_to_energy_management_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/dupabebakudaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdf
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/xekimivejomusifotuvivoja.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/refifuruguvukabopibale.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_off000052fa.bin
5f6edac1ee2c6e5bfc8c8a3d5a98fe24a640e142a0391a8927dfbc2624266669
pdf-font-stream PDF embedded font (sfnt) at offset 0x52FA 5068 bytes
font_01_sfnt_off0000645a.bin
c9ebcd005f098aae5eb22d28220bcd1116b2abc569603ac24155537e1534f078
pdf-font-stream PDF embedded font (sfnt) at offset 0x645A 10240 bytes