Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d189131e375db29…

MALICIOUS

PDF

53.3 KB Created: 2020-08-22 16:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f58848f7600bdbff827fb196e664771f SHA-1: 9d343c6ce8472627cc9f51e1ce14cdcc2763338f SHA-256: 2d189131e375db29acef0e4186bc12cf0bc37285a1d3672479df73b91e1ffd26
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the target of the redirector. The presence of multiple Shopify URLs suggests an attempt to disguise the malicious link within a seemingly benign domain, a common tactic 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.com/pify?keyword=lagu+whistle+blackpink+korea+version
    • http://wazivap.colleenclement.com/uploads/1/3/0/7/130739826/mutade.pdf
    • http://files.webuyjunkcarstrucksvansingeorgia.com/uploads/1/3/1/4/131453465/f10b9.pdf
    • http://tuxidezo.jbeautyusa.com/uploads/1/3/0/8/130813747/tujub_karaxuf_bewofurixova_wowafakojaxizo.pdf
    • http://peloj.recambiosmecaelectric.com/uploads/1/3/1/3/131379179/8826659.pdf
    • http://files.webuyjunkcarstru
    • https://cdn.shopify.com/s/files/1/0432/3852/3047/files/9330689600.pdf
    • https://cdn.shopify.com/s/files/1/0429/2031/2991/files/wejatozi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3748/9309/files/zegufo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/niburosuwijaverofevo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/bifefusapudilikizex.pdf
    • https://cdn.shopify.com/s/files/1/0438/4768/0162/files/basasip.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/potivukuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/jadakaxufo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/23420764537.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e5d.bin
79f4a66ae31f91de963fa59b1f2b2208029fc9dc2dc0063270eb340e05fbb994
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5D 11532 bytes
font_01_sfnt_off00009263.bin
87c6d82c9fb54eba5a22bb411aba6bd228cccc322212b84e22c60875a3938991
pdf-font-stream PDF embedded font (sfnt) at offset 0x9263 5492 bytes
font_02_sfnt_off0000a51c.bin
77cabf56d63d1fabc178917fba12aab19effcb4feb437a91f44f00c1b0dca247
pdf-font-stream PDF embedded font (sfnt) at offset 0xA51C 10076 bytes