Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7bf20a8ed946dfe…

MALICIOUS

PDF

45.8 KB Created: 2020-07-30 10:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c8d3ec97e261694501fe7045784ef3e SHA-1: cdb43309e85b3374de80ae8dae1616ac693290cb SHA-256: d7bf20a8ed946dfe45e895c06dbbd737805414ed9aafd1d2bfe28f3e4b003f3b
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, appears to be a lure related to 'body parts exercises for adults pdf'. The presence of a malicious redirector and a large number of external links suggests an attempt to drive traffic to malicious sites, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of direct payload execution.

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.ru/pify?keyword=body+parts+exercises+for+adults+pdf
    • http://files.blairmielnikdesign.com/uploads/1/3/0/7/130739247/5e02b27.pdf
    • http://files.bulldogsread.com.au/uploads/1/3/0/7/130739330/keturaniwodun_poxow_tubebo_zevabonolidix.pdf
    • http://files.justagproductions.com/uploads/1/3/2/8/132814048/ludoduwuz_sivipaleka_magejirozuke_kikabogijolu.pdf
    • http://files.yogabluetour.com/uploads/1/3/1/3/131397964/a963de.pdf
    • https://cdn.shopify.com/s/files/1/0435/5050/7167/files/68456007049.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/18057836148.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/43817405714.pdf
    • https://cdn.shopify.com/s/files/1/0436/5415/2342/files/46636168574.pdf
    • https://cdn.shopify.com/s/files/1/0440/2036/7510/files/balokunoxarifaneguj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5868/files/xakapasulidinisumod.pdf
    • https://cdn.shopify.com/s/files/1/0434/1497/8718/files/13371901046.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/61905698358.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63545483179.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7468/files/45631991738.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_off0000754f.bin
bb235d21ea01b41aefcbd409ade5f3a50fc686f9f2036fbc396e4b2e9b9e22b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x754F 5144 bytes
font_01_sfnt_off000086f4.bin
fe6a518572762cdb7aa252d042f905fa23ff819d475844dd3a276193520a25da
pdf-font-stream PDF embedded font (sfnt) at offset 0x86F4 10288 bytes