Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0063c1bbdbad1ab…

MALICIOUS

PDF

59.0 KB Created: 2020-08-06 23:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dc5bc2f7de2bf2a1b009054992cc7c7 SHA-1: 1674f50022a1711eb31e7390683d8b6c75cde20f SHA-256: f0063c1bbdbad1ab1a006ad59043fd3e14742ed0747ee4a4a9d448faaa482b17
152 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDFs, with one specifically pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of a large number of SEO-optimized PDF links indicates a potential link farm or content stuffing technique to improve search engine visibility for malicious content.

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=pre+islamic+arabia+political+condition+pdf
    • http://files.schombergcommunityfarm.ca/uploads/1/3/1/3/131380868/c3c31a37f78ec7.pdf
    • http://files.lexiforbes.com/uploads/1/3/0/9/130969190/72bc0aeb.pdf
    • http://files.poehaku.com/uploads/1/3/1/6/131607239/ab7f23f.pdf
    • http://files.fishreeladdiction.com/uploads/1/3/1/1/131164386/93dc0.pdf
    • http://files.orendagametables.ca/uploads/1/3/1/3/131398308/xefugu_sekuzizu_lavevotigix.pdf
    • http://files.orendagameta
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/93805671792.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/42521956871.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/10714668489.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0435/8933/7256/files/technical_manager_cv.pdf
    • https://cdn.shopify.com/s/files/1/0434/6927/5286/files/81062302112.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2063/files/anatomia_de_la_arteria_carotida_interna.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/54121970790.pdf
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/78624427405.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/50541033178.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/zedunijegodumafakuwelo.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_off0000aa66.bin
fc2ad3cfd931a15025132f7d9ce1a07153001a6a3572976c034570033d5a6395
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA66 5444 bytes
font_01_sfnt_off0000bcce.bin
a03d564e31f76b75e3adf79ec7af37aee89afb36eb6637bcee0609ccb07a1a28
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCCE 9924 bytes