Malicious PDF — malware analysis report

Static analysis result for SHA-256 4606705979e901d4…

MALICIOUS

PDF

54.9 KB Created: 2020-08-12 00:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 380cba867d0953f2a1246fba26835b34 SHA-1: 0e9914059ebbf87583727a80bebeb29ae032a79f SHA-256: 4606705979e901d46bde61c57837a870db16c5b4d7234f202ad1e3209de12413
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The presence of the URL https://ttraff.ru/pify?keyword=asynchronous+transfer+mode+pdf and numerous other links points to a likely phishing or malicious redirection scheme.

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=asynchronous+transfer+mode+pdf
    • http://files.hartfordfederated.org/uploads/1/3/2/6/132682904/favapilov.pdf
    • http://rugar.embracedlingerie.com/uploads/1/3/1/8/131856907/dabokoxikadawog_xajetomakane.pdf
    • http://files.shepherdaitheros.com/uploads/1/3/0/7/130738524/fenili_bavosetitev_bosaxujigagi_keduber.pdf
    • http://files.thesearenotmygrandkids.com/uploads/1/3/0/7/130776208/pamalofosa-xobanot-ripofix.pdf
    • https://cdn.shopify.com/s/files/1/0436/3173/9033/files/skitarii_codex_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/3291/0751/files/63096795336.pdf
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/bojonidirokulujenido.pdf
    • https://cdn.shopify.com/s/files/1/0432/8675/7536/files/50131263496.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/banen.pdf
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/octavia_butler_dawn.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4334/files/3640263568.pdf
    • https://cdn.shopify.com/s/files/1/0438/0937/4365/files/saliwujosutexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/17633653058.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6200/files/98267233265.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/55619526785.pdf
    • https://cdn.shopify.com/s/files/1/0431/8248/9762/files/notukaporowunuv.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_off000098d9.bin
09600c345b407c9b243cf47ae64bf087bd652e7eceb77a400384c0a53be842ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98D9 5456 bytes
font_01_sfnt_off0000ab3b.bin
432c6599c400b5d30e5b93936eaba449890a4cd825179673ab85648aa16d1f33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB3B 10548 bytes

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