Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e6b4acfba2abb0…

MALICIOUS

PDF

49.5 KB Created: 2020-08-23 23:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d018f52b22b45db7e5046b37114c6e3 SHA-1: 0e87f362ad7751f0cb1acffae8d9e768d88c4ba4 SHA-256: 89e6b4acfba2abb0806f42bb4abe6dd10c38ae1aabb2c211bc95d33ba253e142
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=anime+wallpapers+for+android+phones'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to 'anime wallpapers'. The PDF also contains a link farm heuristic, indicating numerous external links, with the first being 'https://cdn.shopify.com/s/files/1/0434/2225/3205/files/noseluj.pdf'. These factors suggest the document's primary purpose is to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=anime+wallpapers+for+android+phones
    • http://files.yogamuseinc.com/uploads/1/3/0/7/130740625/kowejobal.pdf
    • http://files.meganjosterhout.com/uploads/1/3/1/4/131454719/rimomiwene-mufevesenupot-xolideb-zukinilu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3205/files/noseluj.pdf
    • https://cdn.shopify.com/s/files/1/0440/7705/6165/files/xuvuwesejewobituxazimaka.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5510/files/bikokibepifaviwokugubem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/2686/6599/files/jokifumopopepadiwubezer.pdf
    • https://cdn.shopify.com/s/files/1/0432/0401/8336/files/rikanu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/bizosuwokefajawafopuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/wodiparip.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/serutamilutapado.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9208/files/pokemon_yellow_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0435/5643/8165/files/jenen.pdf
    • https://cdn.shopify.com/s/files/1/0430/6960/4001/files/94362611060.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_off00007711.bin
ba793b1c40c476bbb936ef8f14e9800c60d4e1ee166c033dda4cac1b937e6838
pdf-font-stream PDF embedded font (sfnt) at offset 0x7711 5068 bytes
font_01_sfnt_off00008816.bin
14200c0ca3a2ac79fe6edb5f7bc910b0e42c8d32d609df15bf8522ba801d1cf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8816 10244 bytes
font_02_sfnt_off0000ab1a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB1A 4324 bytes