Malicious PDF — malware analysis report

Static analysis result for SHA-256 049d9956653336dd…

MALICIOUS

PDF

42.0 KB Created: 2020-08-14 10:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d6d6e505e363b15b700c55e87b85fdf SHA-1: eb1196ef7ca8f31a13e881fe26679a63643f5c00 SHA-256: 049d9956653336dd324bce5ef21dafc9212a2c0e165ef1b977a3b486c786f47a
194 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 are designed to appear as legitimate documents but lead to malicious infrastructure. One URL, 'https://ttraff.cc/pify?keyword=a+bazz+rockstar+song', is identified as a known malicious redirector. The document body is heavily obfuscated, but the presence of numerous links and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=a+bazz+rockstar+song
    • http://files.farrellheatingandcooling.com/uploads/1/3/0/7/130739227/f27913e8.pdf
    • http://files.shannabutler.com/uploads/1/3/0/8/130814475/3616428.pdf
    • http://files.wildlifeworldwidephotographycompetition.com/uploads/1/3/1/3/131379040/d803572bb.pdf
    • http://files.monicasayers.com/uploads/1/3/0/8/130814475/16eceaf4c20.pdf
    • http://files.loesshillsalliance.com/uploads/1/3/0/7/130775679/2470401.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0549/9803/files/south_iceland_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/tolizefusodedumilabevo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2613/files/dufax.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/tabeer_ur_roya_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7654/files/lolaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4646/0840/files/31736574332.pdf
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/48977426269.pdf
    • https://cdn.shopify.com/s/files/1/0434/8461/0712/files/biosynthesis_of_bacterial_cell_wall.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4095/files/when_does_pumpkaboo_evolve.pdf
    • https://cdn.shopify.com/s/files/1/0429/0566/5703/files/jebolijepaxukotakerova.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/41325147949.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_off00005b2f.bin
fbaae7ba2188a0ed485ffc2d644fb8ced20c701dabb60c1fd671ced18b13ecb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2F 5180 bytes
font_01_sfnt_off00006ce7.bin
2e74407e81be255acf6bd829e0ae364e0ce4b046921bd4188a4aa4c3ef0bbe7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE7 14304 bytes

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