Malicious PDF — malware analysis report

Static analysis result for SHA-256 073e2fc66dd3459a…

MALICIOUS

PDF

46.0 KB Created: 2020-08-07 05:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83973a08b87b34bfd8a1042d6480c8d1 SHA-1: fe2a6d248d861c5b07e18745b3aae963541963ce SHA-256: 073e2fc66dd3459afc02ae1371589ef545943200a513cb25393f1a477a8c40b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDFs, suggesting a link farm or SEO poisoning attempt. One of the primary URLs, 'https://ttraff.ru/pify?keyword=strategic+change+management+process+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, indicating an attempt to drive traffic to malicious infrastructure. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence suggest malicious intent.

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=strategic+change+management+process+pdf
    • http://files.onesaint.org/uploads/1/3/1/8/131856212/xuwefexol_pumuluwizuw_kidawuxegoxa.pdf
    • http://files.dancerscornerlr.com/uploads/1/3/0/9/130969800/2d05f76ffaf.pdf
    • http://files.testimoniesofwitness.com/uploads/1/3/1/1/131164573/6453491.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0443/6390/files/49623144299.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/24428767272.pdf
    • https://cdn.shopify.com/s/files/1/0434/0029/8648/files/jamesatuzimetetudanev.pdf
    • https://cdn.shopify.com/s/files/1/0437/1975/3879/files/human_anatomy_drawing_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/3358/2998/files/kojasedupukupegujadari.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/4687840389.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/78822286897.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/kekosipewubo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/xonasizimaxuxifodalewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/29399017549.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/bulnesia_sarmientoi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5676/6869/files/i_know_that_girl.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a4a.bin
1e99de6b6c98a350ef3a2eb9aec4c7600b77130fc02fab17daab8406a58f7ddf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4A 5640 bytes
font_01_sfnt_off00007d51.bin
2d1ec27be1cdc8692a5052450de527352db7720788e2b023c2bd2d16f0aba882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D51 14516 bytes

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