Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fe2c061dde0649…

MALICIOUS

PDF

73.1 KB Created: 2020-08-12 23:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 841a69c162cb56a09d405d81e63c9ffd SHA-1: 62776df603064610fac7397977193233212628db SHA-256: 01fe2c061dde06492be446a61784d438308b88b9019bb5170d45e1ed8b5f2dc8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=cendrars+l+homme+foudroy%25C3%25A9+pdf'. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, many of which are benign Shopify URLs but one malicious redirector. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of 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=cendrars+l+homme+foudroy%25C3%25A9+pdf
    • http://files.riihannonwilde.com/uploads/1/3/2/6/132695620/9567620.pdf
    • http://files.taylorlien.com/uploads/1/3/1/4/131437504/434229b5c7d.pdf
    • http://liwusakol.yogapeutics.com/uploads/1/3/1/4/131482975/robowinabot_fibujus_kivedigima.pdf
    • http://files.urbanstreamecology.org/uploads/1/3/1/4/131453076/jamasu-xoxitenotan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/6650/7942/files/89585329802.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/88756328636.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/58571037878.pdf
    • https://cdn.shopify.com/s/files/1/0439/7305/0526/files/brunei_country_profile.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/madefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/26733993750.pdf
    • https://cdn.shopify.com/s/files/1/0440/7037/1493/files/louisiana_sample_ballot.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/pengertian_behavioristik.pdf
    • https://cdn.shopify.com/s/files/1/0427/5542/4423/files/simple_present_progressive_tense_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/8542/1978/files/69349289594.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/call_of_cthulhu_7th_edition_investigator_s_handbook_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5813/4168/files/cartesian_to_cylindrical_coordinates.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cecd.bin
3d6a8fd025e2f210a49d58bdf80a660d7818c8bee0935c23f3a09368e54a3367		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCECD 5304 bytes
font_01_sfnt_off0000e061.bin
d509c3cf6aa944bdcb6d2583ce64acbf10f48c56c6a1804789b39fec7eedd9d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE061 12496 bytes
font_02_sfnt_off000106fb.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106FB 4324 bytes

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