Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f69d3d1996d939…

MALICIOUS

PDF

49.6 KB Created: 2020-09-03 00:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39dd5fd2e520632d85053f374bbee9c6 SHA-1: c8d27d05cc06b873d519d81feba03f34b5d2d18a SHA-256: d6f69d3d1996d9391176e549f1a1c18eb8a7c9db2e35d20a7e33645ba574ca61
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the text 'Probation appraisal form meaning' and the URL, suggesting a lure to disguise the malicious intent. The presence of numerous external PDF links, many pointing to Shopify domains, indicates a link farm strategy, potentially for SEO poisoning or to host further malicious content.

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.cc/wix?keyword=probation+appraisal+form+meaning
    • https://cdn.shopify.com/s/files/1/0433/8299/7141/files/fade_to_black_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8822/files/15726229227.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/28634242129.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3104/files/chikati_gadilo_chitha_kotudu_audio_songs.pdf
    • https://static.usrfiles.com/ugd/c162b3_d8c3332ab61d42e69331682e0b0f2d70.pdf
    • https://static.usrfiles.com/ugd/b8c837_c69a25be5569414c8ca8b10054670f96.pdf
    • https://static.usrfiles.com/ugd/b3bc21_0cece08222d847e78361fd9816584492.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b86ac5d3a4c43088823d502d87f9643.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_22ac9dfd598846ecb636b6b93dca79c3.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/bestwap_punjabi_song_2019.pdf
    • https://cdn.shopify.com/s/files/1/0437/7087/1970/files/plant_biochemistry_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/luxukuzevipalenepudosev.pdf
    • https://cdn.shopify.com/s/files/1/0460/9707/2292/files/biruxonakivabekimal.pdf
    • https://static.usrfiles.com/ugd/b8c837_7feaf049251544e6986e45ce167989e9.pdf
    • https://static.usrfiles.com/ugd/fe83c3_bbf311db72b14ad9ba636850bccf2b6d.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_3e7f2203055b423f853f2340f13aac09.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1f7a7240fc547119f6dc051bed9310f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b32a74b91bb420795f36a5d49a4752e.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_off00008526.bin
d259cab7ade3fe67198f5d45b7772b11893122e4609a3b783068924ccc0299ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8526 5360 bytes
font_01_sfnt_off00009747.bin
2712d566919b93ead7f7de413c82f31fdca64bffa0bc34c8815084cc5a7c3e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9747 10088 bytes

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