Malicious PDF — malware analysis report

Static analysis result for SHA-256 626646994bc4cf6d…

MALICIOUS

PDF

45.4 KB Created: 2020-08-03 01:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c40e63bcc31cc21d280afdbccf43fba9 SHA-1: a6957011913bf0e4060cca3da4865affb13e280a SHA-256: 626646994bc4cf6d8860a4e966eda6d1b07ebb4c3a2fed63f8dd9fb926df8302
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded links, including one to 'ttraff.ru', suggest an attempt to redirect users to potentially harmful content or participate in SEO manipulation.

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=dd-+wrt+router+mode+vs+gateway+mode
    • http://files.4seasonsathletics.com/uploads/1/3/2/7/132740951/sajadun_pimabaxu_kumog_newulodanim.pdf
    • http://files.mullinvilleks.com/uploads/1/3/1/4/131406344/177006.pdf
    • http://files.allamericancargo.com/uploads/1/3/1/3/131398428/62b34e3.pdf
    • http://files.morgan-lindsey.com/uploads/1/3/1/4/131454816/vabemarujewoge_nisokusoxibeb_zizilekilazexed_jofefij.pdf
    • http://files.grandvoyageitaly.com/uploads/1/3/1/4/131438759/7344799.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/8342/3128/files/lemuvavepezifusofudobexox.pdf
    • https://cdn.shopify.com/s/files/1/0439/9045/0334/files/30831569621.pdf
    • https://cdn.shopify.com/s/files/1/0440/6103/2598/files/50285510113.pdf
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/hp_digital_imaging_monitor.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/63864153965.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1410/files/vozunukutaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/ad_d_1st_edition_character_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2384/files/daft_punk_around_the_world_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/29924026619.pdf
    • https://cdn.shopify.com/s/files/1/0433/6553/1806/files/luziravevetetijiset.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/nuniverosuvowadirumit.pdf
    • https://cdn.shopify.com/s/files/1/0438/3123/0624/files/proscan_tv_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0624/files/suwiruzidininufa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5970/7037/files/31830099832.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_off00006463.bin
0fe4e72a7576c5d83725455efe75f92a18c2764e974a129665b56e2e02afa804		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6463 5124 bytes
font_01_sfnt_off000075f7.bin
498ea11697de84bd81807f495d1dd17c244564655239d17e037f28389de61371		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F7 10612 bytes
font_02_sfnt_off00009a31.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A31 4324 bytes

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