Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1e75e89c723b3b…

MALICIOUS

PDF

50.2 KB Created: 2020-08-24 22:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0afeae2dde090ff3b28f7734ebbb4b49 SHA-1: 09af6038cd42c35e641ee97de17c32c885c047dc SHA-256: 2f1e75e89c723b3bb5eb8f13205f3c16d6ca0bcbca763d96c3a321fd547505a3
152 Risk Score

Malware Insights

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

The PDF contains embedded links that are flagged as malicious redirectors. The document body text, though partially corrupted, suggests a lure related to 'worksheet answers'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits. The PDF structure and embedded links are consistent with a phishing or social engineering attack.

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=the+strategy+of+containment+worksheet+answers
    • http://files.m3acres.com/uploads/1/3/0/8/130874007/xojoxuparunozanulot.pdf
    • http://files.lovolutionofkindness.com/uploads/1/3/0/8/130815437/vuzelifizod.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9642/files/7891566015.pdf
    • https://cdn.shopify.com/s/files/1/0465/3459/0614/files/analytic_geometry_and_calculus_2.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/78481141339.pdf
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/59805920731.pdf
    • https://cdn.shopify.com/s/files/1/0437/0586/0248/files/gopabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/nunimujivudu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4211/8555/files/phenol_sulfuric_acid_method_for_total_carbohydrates.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/53840445302.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_off0000785a.bin
6c2878453ea9612b3b1c371cc1a95dd2fe2e5b74e81ef36038336399f3e8ff46
pdf-font-stream PDF embedded font (sfnt) at offset 0x785A 5256 bytes
font_01_sfnt_off00008a23.bin
e20f99c6401b1216f402b6629c5b93a58947d75a8a6a2e721924eb04b05f3ce9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A23 10500 bytes
font_02_sfnt_off0000adff.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xADFF 4324 bytes