Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ecc7c20b5a80165…

MALICIOUS

PDF

51.4 KB Created: 2020-08-10 12:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 120391b3d03fda30edf0a1b48c6d29d5 SHA-1: 38e3c7da7680be9a64e882ec6323f5ebccab49a5 SHA-256: 6ecc7c20b5a8016546f2dcea8f61ca6e5e6be41a2ceed4635b4148d34102a26d
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a redirector link to 'ttraff.com'. This suggests the document is designed to lead users to a link farm, potentially for SEO manipulation or to distribute further malicious content. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=carrier+split+air+conditioner+catalogue+pdf
    • http://files.connectionsonthebay.com/uploads/1/3/1/1/131163752/jixibamalifokomut.pdf
    • http://files.roofingnorthtexas.com/uploads/1/3/1/6/131607407/cb6009dc.pdf
    • http://lipegi.hookedontravelagency.com/uploads/1/3/2/6/132681947/2000528.pdf
    • http://files.learnpallcare.org/uploads/1/3/0/9/130969191/b5e384f0f.pdf
    • http://tamofe.fivelevelsconsulting.com/uploads/1/3/2/6/132683014/piduxupenugug_niluluzar.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5521/0905/files/1978_kawasaki_kz650.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/rekakawekizakepo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/avadh_university_ba_time_table_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/pezarepelejofe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/kasiluxefonofaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/13879080456.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/8502453416.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/bajariwuxofilusap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://cdn.shopify.com/s/files/1/0437/6094/3258/files/2046787781.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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000073a0.bin
6c4af3a6a8f262ec44ef19a2e05fc81d9370ac110cd0e31b09e2846734c88878		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x73A0 11660 bytes
font_00_sfnt_off000061d1.bin
1cec1a347fe25fc66132d9667e360c4a443f7b222db181b2a5d5d34f8ca19303		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D1 5228 bytes
font_02_sfnt_off00009383.bin
ed9d2428bb28c2090d4920c8455400b01da1aa8aaca602fbbe1930ca0b42a66f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9383 14312 bytes

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