Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe3537ea8a6242b…

MALICIOUS

PDF

37.7 KB Created: 2020-08-22 03:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f841a9fef0fae97a034c143a0864d814 SHA-1: dfd08175103a51310c4d193d527ef1ce6cc0c3e4 SHA-256: bfe3537ea8a6242bf3e002c9a2e5055710fe4cf34daf491caf1812b2a0299448
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of an SEO link farm, embedding numerous links to external PDF files, many hosted on Shopify. The primary malicious URL identified is ttraff.cc, which likely serves as a redirector to further malicious content. The document body contains garbled text but includes the malicious URL and several benign-looking Shopify URLs.

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.cc/pify?keyword=afrojack+songs++turn+up+the+speakers
    • http://juvuv.faloonaagency.com/uploads/1/3/2/8/132815758/xotegapube.pdf
    • https://cdn.shopify.com/s/files/1/0432/9046/0324/files/affidavit_of_support_letter.pdf
    • https://cdn.shopify.com/s/files/1/0437/7359/1701/files/assurance_of_salvation_navigators.pdf
    • https://cdn.shopify.com/s/files/1/0436/9160/6170/files/xoxuri.pdf
    • https://cdn.shopify.com/s/files/1/0429/5901/2006/files/saccharomyces_cerevisiae_fermentation.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3541/files/angular_format_datetime_string.pdf
    • https://cdn.shopify.com/s/files/1/0437/9849/5389/files/46050309891.pdf
    • https://cdn.shopify.com/s/files/1/0439/8877/9166/files/gym_cardio_workout.pdf
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/kuliligagajinorixad.pdf
    • https://cdn.shopify.com/s/files/1/0430/0229/8521/files/39313288414.pdf
    • https://cdn.shopify.com/s/files/1/0438/5033/4368/files/jamia_millia_islamia_anti_ragging_affidavit.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4472/files/25308616887.pdf
    • https://cdn.shopify.com/s/files/1/0428/9655/6191/files/15128119066.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/26305642456.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_off00004f1b.bin
2917cbf3c30fe9d5baea5b29d501cce15c45293c8351144056e5f37b93784db1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F1B 5376 bytes
font_01_sfnt_off00006171.bin
9bf68694ea3ee9a28f4862e37350f983ab61b5473d9c2cb11a4d62097386431c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6171 14076 bytes