Malicious PDF — malware analysis report

Static analysis result for SHA-256 af7ded80802429a8…

MALICIOUS

PDF

75.0 KB Created: 2020-08-15 02:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21e672bb230f83565ad35e8be2d14ca7 SHA-1: a6c680881a35465bbdc3df9d5253cb2ce3521bab SHA-256: af7ded80802429a894edf24ac869edfdaf56f6a311d8063ec0355eb0c4242872
154 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL pointing to ttraff.com, indicating a potential redirection to malicious infrastructure. The ML classifier also strongly suggests maliciousness. The document body contains garbled text alongside URLs, suggesting an attempt to obscure the malicious intent or manipulate search engine results.

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/pify?keyword=define+alternating+current+waveform
    • http://junesur.alibarker.com/uploads/1/3/1/4/131454065/3090707.pdf
    • http://gitagufa.rehellisetuutiset.org/uploads/1/3/0/7/130739783/bupil_vudepofuzanug.pdf
    • http://files.maidtoshineservices.net/uploads/1/3/1/4/131437268/29f33e.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/spider_man_2002_pc_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6516/files/jexesotubila.pdf
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/tuzujegikalinukisem.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/libeviborodavozexexiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/bamajeronuzovavoxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/9387757545.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3013/files/aprendizagem_organizacional_conceito.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0554/files/rebiravigiwud.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_off0000d39a.bin
f0360a4d1c6f9aa97ab12ad59df24ab6477a36dc85a9f4a9b35d2191fe8f7736
pdf-font-stream PDF embedded font (sfnt) at offset 0xD39A 5172 bytes
font_01_sfnt_off0000e53c.bin
269923eb0aca469a2a325c5249c57eb472fa8af08a19024e8f9cca76d198588e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE53C 10948 bytes
font_02_sfnt_off00010ad3.bin
149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD3 16036 bytes