Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2580894da192661…

MALICIOUS

PDF

41.1 KB Created: 2020-07-09 21:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 122d05eda00b447da452cd8c7c04f2c6 SHA-1: 836eb03b4a3884b0bd84a8f0ca01253034cbbe18 SHA-256: a2580894da1926611217bca8e8b559ac59ad69e9ed4b41927b1a8a1f18ef1c6d
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to domains associated with link farms and redirectors, such as ttraff.com. The document body text also includes these links, disguised as helpful resources for converting PDF to Word. This suggests a social engineering tactic to drive users to malicious websites, likely for phishing or malware distribution. No scripts were extracted from this sample.

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/wb?keyword=convert%20pdf%20to%20word%20in%20macbook%20air
    • http://files.eguastella.com/uploads/1/3/1/8/131871690/4656610.pdf
    • http://files.communityactionboonewinn.org/uploads/1/3/0/7/130775116/4e7630651.pdf
    • http://files.iwfgeorgia.org/uploads/1/3/0/7/130740050/40ba9300afc.pdf
    • http://files.focusedlearningsolutions.com/uploads/1/3/1/6/131636990/49d8e9.pdf
    • http://files.ateliermandaline.com/uploads/1/3/0/7/130775752/1399925.pdf
    • http://files.supernaturalentertamitedproductions.org/uploads/1/3/1/4/131455883/visemomitowezij-fezaweku-xevut-kixivim.pdf
    • http://files.brunomacdonald.com/uploads/1/3/1/6/131636772/kobamu-mesoxemo.pdf
    • https://wikanoxegi.files.wordpress.com/2020/07/wonijanu.pdf
    • https://lixofejuj.files.wordpress.com/2020/07/19090309535.pdf
    • https://wogazadu.files.wordpress.com/2020/06/mewone.pdf
    • https://kepazokapepa.files.wordpress.com/2020/06/saxewerajolosuze.pdf
    • https://gususipo.files.wordpress.com/2020/06/mewinujixavanu.pdf
    • https://wabuvodulix.files.wordpress.com/2020/06/xutoxalifajivu.pdf
    • https://fobuvujeseme.files.wordpress.com/2020/07/mimujatukalud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81858120772.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29942388251.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mesujegixaxufusataxa.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_off00006335.bin
f5cf3fcce8a47af2319161318d006c051454c9c033ecf38e3ff8a537727116c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6335 5256 bytes
font_01_sfnt_off0000750f.bin
d7272d966a602bf345e3c29b104cdaf1e8402793e1623b55bb71cc17f2c6d927		 pdf-font-stream PDF embedded font (sfnt) at offset 0x750F 9932 bytes

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