Malicious PDF — malware analysis report

Static analysis result for SHA-256 01418656921c798f…

MALICIOUS

PDF

51.4 KB Created: 2020-08-24 01:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d847691e7cec0dab0e2c604287de823d SHA-1: ea3563c033fd768d7c568edac54158bf3d9b5719 SHA-256: 01418656921c798fed5deff5dfcc6fed5b9efdcb729b3071e05f92151d742057
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted from this sample.

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=civil+war+bugle+calls+sheet+music
    • http://kesumuro.bentonssugarshack.com/uploads/1/3/1/0/131071220/5e6800e70b7.pdf
    • http://weremoxu.athleticteamspirit.com/uploads/1/3/1/4/131437354/2207135.pdf
    • http://xodidu.nyinsuranceguys.com/uploads/1/3/0/8/130813306/minadipirawenav.pdf
    • http://files.gracefamilysudbury.com/uploads/1/3/0/9/130969424/177f88d9c0a.pdf
    • http://luker.sedgeleyclub.org/uploads/1/3/2/3/132303219/totebe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/kuzuloje.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/82144302235.pdf
    • https://cdn.shopify.com/s/files/1/0436/5749/4693/files/hit_that_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0441/2496/2968/files/pulmonary_edema_grading.pdf
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/dobirilanorana.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/zulokade.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1477/files/89833594999.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/90533020168.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8686/files/katerekavolumijaru.pdf
    • https://cdn.shopify.com/s/files/1/0432/2538/3074/files/87277376950.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_off00008b7c.bin
faef3f198ec8b53e3d445a17510438569ed201721b23e49ea023f017783acd10
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7C 5412 bytes
font_01_sfnt_off00009dc7.bin
9d79f3162f2b3ccb1df9eb8fe998e1446a043f48053454022c4b1e94970cfa84
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC7 10120 bytes