Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2de083ba48fd53…

MALICIOUS

PDF

40.4 KB Created: 2020-08-04 02:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4c0cd78d7e8cffe763bd5cd6f6fe72c SHA-1: fb3d1de1729c0ff85f5fa7f4bf1ada0483c7cff8 SHA-256: 7a2de083ba48fd5341ce555f36cf4f06ea37b53dfbd092bb752dff997fdc9d56
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a document about 'medicalization in psychiatry'. This suggests a phishing or social engineering attempt to lure users to a malicious site. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO link farm abuse. No scripts were extracted, but the primary malicious behavior 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.cc/pify?keyword=medicaliza%25C3%25A7%25C3%25A3o+em+psiquiatria+pdf
    • http://files.bamboozlestraws.org/uploads/1/3/1/4/131408241/bafetogir.pdf
    • http://files.elvsoftball.org/uploads/1/3/1/1/131163976/raxosutamulen_wovabuseroraxa_vudomobijoj_dabizufo.pdf
    • http://files.douglasshaunephotography.com/uploads/1/3/2/7/132740480/kezijajavolugel.pdf
    • http://files.graceholland.net/uploads/1/3/0/7/130739004/sorere_gokoxedukexokur_jezegabir_nijawa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1818/9980/files/20530743477.pdf
    • https://cdn.shopify.com/s/files/1/0438/5102/2501/files/rewamogitiluregapi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5583/1445/files/nekululejodeva.pdf
    • https://cdn.shopify.com/s/files/1/0448/4320/4765/files/memorex_cd_lablemaker.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/10411496273.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9966/files/81463001426.pdf
    • https://cdn.shopify.com/s/files/1/0448/0460/4066/files/aisc_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0756/5214/files/14724224459.pdf
    • https://cdn.shopify.com/s/files/1/0431/5571/8298/files/34759051856.pdf
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/warima.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1097/files/96263422652.pdf
    • https://cdn.shopify.com/s/files/1/0430/5738/1530/files/55079474893.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.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_off00005988.bin
b127c092d77cd5ca42d428e6237079519bdd5079187ed3d3050d1f5740d184ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5988 5980 bytes
font_01_sfnt_off00006d03.bin
27823c397b8e0f72df4e783263190e6ead08ba39610538589b2a763fc3186c3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D03 12232 bytes

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