Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1fc1d24ce30420…

MALICIOUS

PDF

41.5 KB Created: 2020-08-12 12:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f751cf6991db8a7a5681575a1e2395ad SHA-1: a30318a834092d9509fb1681c9fea808eb477630 SHA-256: 0a1fc1d24ce304209d591ba16ac851eaad26959dda6243da16b9c9494107c35d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into clicking it under the guise of a report. The presence of numerous other PDF links, many pointing to unknown domains, further supports the 'link farm' heuristic, indicating a likely attempt to drive traffic to malicious sites.

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.com/wb?keyword=evaluatepharma%20world%20preview%202019%20outlook%20to%202024%20pdf
    • http://sixoliwez.twrcma.com/uploads/1/3/0/8/130814310/98b15d38583f.pdf
    • http://files.musicalinstrumentswholesale.com/uploads/1/3/2/7/132740805/kevapota_sojujubu_ribupive_tiwulot.pdf
    • http://buzepe.arunnersmindset.com/uploads/1/3/1/4/131438096/venuwi-beviwojapig-ketujeze-nopetim.pdf
    • http://files.northgeorgiadaylilysociety.com/uploads/1/3/1/0/131071019/ripokiliro.pdf
    • http://files.luminousmusehealing.com/uploads/1/3/2/8/132815015/kukadilod_metapamoniz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2047/4779/files/macro_sociological_theories.pdf
    • https://cdn.shopify.com/s/files/1/0439/4021/6987/files/ali_baba_and_the_forty_thieves_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/77273325290.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/vonaputexofebemugu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5265/files/xululixeveritiru.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/rolling_stone_top_500_songs.pdf
    • https://cdn.shopify.com/s/files/1/0434/6354/0902/files/gufimarasowux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7400/2837/files/xoraramekodabo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/58303790846.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/kubonuwagurosagirik.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f79.bin
c343ef654824536e5802b9cb7b13dcdf90a4322d8f7b88c28962865f18b418f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F79 5848 bytes
font_01_sfnt_off00007361.bin
f223940d609545fa8bc22c1171ada2a64e023d233586113b32f5b438c31abaaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7361 11312 bytes

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