Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da99b2f64c0e45e…

MALICIOUS

PDF

59.1 KB Created: 2020-08-16 15:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24537eacc4c36d33c79514e881c6cd36 SHA-1: 3a77cbec8bfb73c49bbe12d20221d3916f83dd53 SHA-256: 3da99b2f64c0e45ebf3fb86a898e1845e2878449b979f5a7028fc51098da6d7d
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a document about 'analogical reasoning in islamic jurisprudence'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the link leads to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates the document is part of a link farm, likely for SEO poisoning or to distribute malicious content. No scripts were extracted, but the primary attack vector is the embedded malicious URL.

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=analogical+reasoning+in+islamic+jurisprudence+pdf
    • http://files.culhamafterschool.com/uploads/1/3/0/9/130969357/7625555.pdf
    • http://files.brookturnerblades.com/uploads/1/3/1/4/131453288/xozukizo.pdf
    • http://files.freerangeworship.com/uploads/1/3/1/6/131606397/4fd160ac10dfad3.pdf
    • http://wazafak.casaofstanco.org/uploads/1/3/0/8/130814310/aac326e.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/kidofepogawewuxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1974/files/11445021006.pdf
    • https://cdn.shopify.com/s/files/1/0432/0349/4043/files/33815333014.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6217/files/zavos.pdf
    • https://cdn.shopify.com/s/files/1/0440/6450/6006/files/50_tons_de_cinza.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6895/files/87354294891.pdf
    • https://cdn.shopify.com/s/files/1/0429/1906/7815/files/sumoruledidaluteka.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0378/files/achilles_tendinopathy_nhs.pdf
    • https://cdn.shopify.com/s/files/1/0439/4732/7646/files/mabutejoriwopat.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7078/files/calicivirus_felina.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/dogunijuvewilukofiwek.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/bilopegukufaru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22700630349.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/artificial_selection_in_animals.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
stream_005_off0000c650.bin
26ac58bd21e056868ac488f595eded008ccac5962c75c931b796875f9b3a6cd5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC650 17068 bytes
font_00_sfnt_off00008655.bin
54ed76fd0143a6aa815676e378585c78ac7a4fae34b2dc460e900dd97fdb7a15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8655 5540 bytes
font_01_sfnt_off00009910.bin
afacbf9bf55b1e1f4b22ba15ec321a72291751a9602375cdecb5cd6dc3fed460		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9910 14408 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.