Malicious PDF — malware analysis report

Static analysis result for SHA-256 9985d8388d5fe1db…

MALICIOUS

PDF

43.6 KB Created: 2020-08-02 14:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1f0575d2b8aeda3cbd060ed1d8dba8f SHA-1: 001e2e5f6ba48e0b52e82dfae082e35123a6138a SHA-256: 9985d8388d5fe1db77ea97553281cbb0782ab05dac492847f6b67555bddc3422
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO poisoning or to obscure the malicious redirector. No scripts were extracted, and the PDF structure itself does not indicate exploitation, leading to the conclusion that this is a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=sony+cdp-+cx355+manual
    • http://files.dianeetatumwriter.com/uploads/1/3/1/3/131380728/lusuniveguguzixo.pdf
    • http://files.adam-douglas.co.uk/uploads/1/3/0/7/130775362/3761572.pdf
    • http://files.onmrrc.org/uploads/1/3/0/7/130776041/relemifadosijuwadabe.pdf
    • http://files.uatim.org/uploads/1/3/0/8/130814714/3315363.pdf
    • https://cdn.shopify.com/s/files/1/0432/3183/8368/files/elementary_surveying_13th_edition_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/vofezegikazekoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4557/files/gowatavuwinusepuwilipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/27545493483.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1571/files/74534090125.pdf
    • https://cdn.shopify.com/s/files/1/0434/6888/2072/files/53911433333.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/61131082743.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8936/files/jebenawo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/tupesi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1919/files/polaris_3900_sport.pdf
    • https://cdn.shopify.com/s/files/1/0428/8951/1068/files/saucin_on_you.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/kuxesafetozekiteme.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_off00005026.bin
5141bd7ddd619875290a8335bc58ca5e841841e0a00dd8a95dd2b4f9c98c9e5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5026 5172 bytes
font_01_sfnt_off000061ad.bin
ae7a9464fc9fbd1dc1bbc7cd2a90fa3923ecfae1398529d495ab9bf6bb6e1578
pdf-font-stream PDF embedded font (sfnt) at offset 0x61AD 15548 bytes
font_02_sfnt_off000091c9.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x91C9 4324 bytes