Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c5fee836b13bd2…

MALICIOUS

PDF

60.0 KB Created: 2020-08-09 12:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1464626230add90ad0b124bc4fafd25d SHA-1: 63366711a71a52b034f55f859956b004ca1eaffb SHA-256: 69c5fee836b13bd23a45d1327c0caade3c2f1c82d46d8b8b167c317d52cebd12
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominent URL identified as a malicious redirector. The document body, though partially obfuscated, includes the text 'Harassment architecture pdf download' and the malicious URL, suggesting a lure to a malicious site. The presence of numerous external PDF links further indicates a link farm or redirection scheme designed to obscure the ultimate destination.

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=harassment+architecture+pdf+download
    • http://bunap.bbflockling.com/uploads/1/3/0/7/130775169/2621384.pdf
    • http://files.ian-b-robertson.com/uploads/1/3/0/8/130873830/tesenuveditipot.pdf
    • http://files.thegreatmoosemigration.com/uploads/1/3/0/7/130740193/3970290.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/4146/3189/files/28210400194.pdf
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/susibodamegofegugol.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/jenadenusuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8066/3705/files/cbse_class_12_maths_question_paper_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/speech_writing_examples_for_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0440/6408/0024/files/23341890977.pdf
    • https://cdn.shopify.com/s/files/1/0430/3149/4810/files/casio_fx_991lax_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86187089948.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0899/files/73131647907.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5503/files/tuxetow.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/tinobotozulipexatosek.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000742f.bin
87ab78c22b35e0bb5a628f17210b3882e3b4a22cae0c98985354d2e535ef38ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x742F 5332 bytes
font_01_sfnt_off00008620.bin
867ccca2915ef26bd260cffd85a54d607b2652668642fc693fe69cdfb814578a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8620 4848 bytes
font_02_sfnt_off00009835.bin
23e16259ed58ca4a6848a8106fb399568f17f638b91bf96f86fd03f490b8f2b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9835 10340 bytes
font_03_sfnt_off0000bbd1.bin
d9523ac0764b7a6b956643f1c1edacbeaf878a3f6dc578b5c80f582112821773		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD1 16920 bytes
font_04_sfnt_off0000d3b7.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B7 4324 bytes

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