Malicious PDF — malware analysis report

Static analysis result for SHA-256 3535bfc9a28a4a0a…

MALICIOUS

PDF

44.3 KB Created: 2020-07-23 06:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bc746e170e57c72bc8d776f1dbd1f01 SHA-1: 396f5feba309fbf7c9afde7e3f7e8f816cd5b705 SHA-256: 3535bfc9a28a4a0a14c407f10fb1be07c67c90f90ce5a777e9bbb1cf1d10a20e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of numerous links indicates a likely attempt to drive traffic to potentially harmful destinations.

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=addition%20of%20similar%20fractions%20worksheets%20for%20grade%204
    • http://files.mac-italy.com/uploads/1/3/1/8/131872298/zofizidezade.pdf
    • http://files.handymanportlandmaine.com/uploads/1/3/0/8/130873849/tesugan-binixefagik-rekipugosa.pdf
    • http://files.magicaljohn.com/uploads/1/3/0/8/130814666/dozamefo_posonano_befuta.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7422/files/51886173571.pdf
    • https://cdn.shopify.com/s/files/1/0435/6843/1265/files/88137736611.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/2711025153.pdf
    • https://fogojifoxuni.files.wordpress.com/2020/06/runakewaxut.pdf
    • https://nabenoge.files.wordpress.com/2020/07/wisanokadotuxawafawet.pdf
    • https://xomabife.files.wordpress.com/2020/07/2409914504.pdf
    • https://nojaxasak.files.wordpress.com/2020/07/4147143034.pdf
    • https://jojoveda.files.wordpress.com/2020/07/42767915253.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/libaxufofedogovizuzu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/xurelukekotafeludika.pdf
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/60166015311.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/bunabifurolodebekujid.pdf
    • https://cdn.shopify.com/s/files/1/0428/7932/0223/files/98423504425.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/bezolon.pdf
    • https://cdn.shopify.com/s/files/1/0431/9464/6689/files/nupuzapivinijuwaku.pdf
    • https://cdn.shopify.com/s/files/1/0439/4024/9755/files/jojejigejuted.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_off000070ed.bin
2b89f1a6c63bf2e1acb2fe719611d7e273added38619dc13b826c4954d4d0327		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70ED 5456 bytes
font_01_sfnt_off0000835e.bin
306012f4105c4bb52b92ebac791ca220a8481fc61566c9746ccb6ebb7661e224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x835E 9444 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.