Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a1f13db3879283…

MALICIOUS

PDF

39.6 KB Created: 2020-08-25 03:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 037fd03fa717fb0e6b449d2e41fe41a0 SHA-1: cfd5fc9c66445fbdd109630882ac631396ff20a9 SHA-256: 42a1f13db3879283bd0fcdc62ac34ed0f2630b85d5347171790d31870a37bab2
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is ttraff.com, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF files hosted on Shopify, suggesting a link farm or redirection strategy.

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.com/pify?keyword=kabuki+dance+violin+2+sheet+music
    • http://rukajojo.michaelfridgen.com/uploads/1/3/1/1/131163599/1372364.pdf
    • http://rugobirag.thunderrockfilmschool.com/uploads/1/3/2/3/132303195/wadimaxojigewer-faturo-juwow.pdf
    • http://files.falconssoftball.com/uploads/1/3/0/7/130740249/pesiro_vovonapov_kogak.pdf
    • http://files.ultimatefantasyfighting.net/uploads/1/3/1/4/131438203/rotawalo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/adonis_ratio.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1171/files/95493239227.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/yang_terdalam_cover_gitar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/kedezu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0903/1840/files/tozox.pdf
    • https://cdn.shopify.com/s/files/1/0447/2838/5690/files/abrsm_piano_grade_2_scales.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/garbage_munda_badnam_ho_gaya_song.pdf
    • https://cdn.shopify.com/s/files/1/0439/2307/9323/files/dimotawowupegenin.pdf
    • https://cdn.shopify.com/s/files/1/0462/6710/5429/files/kenuvixetujalukafigokeju.pdf
    • https://cdn.shopify.com/s/files/1/0431/3274/7927/files/network_engineer_interview_questions_and_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8353/0394/files/21842042263.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a9d.bin
d979e7fec07d01613b10c2acd498b01693fa1650c613d48ea575535327614823		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9D 5448 bytes
font_01_sfnt_off00006cfb.bin
f89727c3dc73abb409cc81ec9d894f303b5def48b07456557aa6e17fa48ebad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFB 10724 bytes

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