Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a80f42c4f9cf1ae…

MALICIOUS

PDF

57.0 KB Created: 2020-08-07 09:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9c1b8ff9b41b415ce9098bcd134584f SHA-1: d404816e5d530b820c723bd2387edff4da9b2904 SHA-256: 9a80f42c4f9cf1ae6210482ba7443f5e90f7e5acb5ce8392631df6921b6ecd08
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to external resources, masquerading as a free PDF download. The primary malicious link is https://ttraff.cc/pify?keyword=the+astronomy+book+big+ideas+simply+explained+pdf+download+free, which is a known malicious redirector. The document body itself is heavily obfuscated but contains references to the malicious URLs, indicating a social engineering attempt to trick users into clicking through to potentially harmful 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/pify?keyword=the+astronomy+book+big+ideas+simply+explained+pdf+download+free
    • http://files.misfitangelsrescue.org/uploads/1/3/2/6/132681477/b54eaf6a5.pdf
    • http://files.nducuwangugi.com/uploads/1/3/2/6/132683334/waxaluluxajasi-zugowarinake-vopexuka-bepexowi.pdf
    • http://movajan.beautytaihou.com/uploads/1/3/0/9/130969754/vinis_tizezamalapil_kixopozer.pdf
    • http://files.joshuablubuhs.com/uploads/1/3/0/8/130873839/7793502.pdf
    • http://files.cool-cat.store/uploads/1/3/0/8/130874278/7aeb46bbe4b.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/fegotubekowad.pdf
    • https://cdn.shopify.com/s/files/1/0432/3436/1503/files/varufedotasejaragi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/suforebogekune.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/43743395956.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/67851438374.pdf
    • https://cdn.shopify.com/s/files/1/0429/7746/0383/files/04_acura_tl_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/36680033978.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2074/files/business_budget_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9009/1940/files/jopugevomojodogaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/12855647932.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/fisiopatologia_de_esquizofrenia_paranoide.pdf
    • https://cdn.shopify.com/s/files/1/0429/4000/6559/files/fotifomuwuwirenofu.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006753.bin
4253ce374f546ed82c0b962bfad5e193173c5af7311640f7068ccdda2cb38311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6753 2960 bytes
font_01_sfnt_off000071d4.bin
43346ed9b052d798331f89dccd363aeceef639256b78411876aa908d2f249fe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D4 5868 bytes
font_02_sfnt_off000085c5.bin
0bcedb351eb3025b698ce9c81857b4724297008716a57896723d7ba110dadbab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85C5 8772 bytes
font_03_sfnt_off000096f0.bin
6bf5649f977de638cf366a60ab4a9670b0e2964262ff750deab1e3f985525f20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96F0 13720 bytes
font_04_sfnt_off0000bf0a.bin
0ef0a77ed28bad614549cef4a85166a1100fe302a7c02a29c4be9b9c0152c761		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF0A 16436 bytes

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