Malicious PDF — malware analysis report

Static analysis result for SHA-256 25086d8db1326996…

MALICIOUS

PDF

40.9 KB Created: 2020-08-20 15:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f715b5cf35aa2c7374fe34ec70883312 SHA-1: 049c0974672863056756567ec48089c64132de44 SHA-256: 25086d8db13269961ff4e59acfeadf60ecf88249ebc990bb58e1646e2bb74c19
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but also includes the URL 'https://ttraff.ru/pify?keyword=ipega+game+center+android', which is a known malicious redirector. The presence of numerous links suggests a link farm or phishing attempt designed to lead users to malicious content.

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=ipega+game+center+android
    • http://files.destinyggs.com/uploads/1/3/0/7/130776141/6094260.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0798/files/bejinatokoliterifanaku.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/mutogakatemasekorununi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6340/files/juzagogelov.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/volibu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0346/0259/files/duweditafen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9436/0743/files/mutemusimujuzuxapanelaxod.pdf
    • https://cdn.shopify.com/s/files/1/0429/5534/1977/files/eggs_benedict_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/famojexidurosuwagogusajub.pdf
    • https://cdn.shopify.com/s/files/1/0430/8867/4967/files/32874503428.pdf
    • https://cdn.shopify.com/s/files/1/0437/0857/9993/files/nosisosabade.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/4236808310.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_off00006309.bin
ac318bedb132c1a28915e657fc6a7eef1ad07d78cc50f181c74907724d9ce10c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6309 5120 bytes
font_01_sfnt_off00007457.bin
889f1d2fe26ef8fdb4243a5b09685be66b684a5800483faf1280ec255224d3e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7457 10180 bytes