Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a43bc874e762a1…

MALICIOUS

PDF

119.9 KB Created: 2020-08-12 11:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c83c04cf80deaf6b6061f6e2950e71bb SHA-1: 79d22d074414b4f234591cb372975bc19a56105b SHA-256: 46a43bc874e762a13d4f192250cbc85c231ec637562e0dd235d36bd08777a995
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious payload. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, suggesting an attempt to manipulate search engine results or distribute content. The presence of a 'download button' heuristic further supports the lure mechanism.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=chemical+equilibrium+class+11+ncert+pdf
    • http://files.leasidearena.com/uploads/1/3/1/4/131455832/sowapinosivomoje.pdf
    • http://files.karenjweyant.com/uploads/1/3/0/8/130814676/napepezoze_memaniromumo_damisivapoko_bivokudateriga.pdf
    • http://files.goodworksbuilding.com/uploads/1/3/1/3/131380756/4102269.pdf
    • http://files.elliesparkcity.com/uploads/1/3/1/3/131380875/morajefatim_mibibawutono_tidilutatetex.pdf
    • https://cdn.shopify.com/s/files/1/0435/0243/6518/files/biology_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/2077/8653/files/falomovulekuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26384136461.pdf
    • https://cdn.shopify.com/s/files/1/0437/5753/5390/files/badminton_rules_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/atomic_orbitals_and_molecular_orbitals.pdf
    • https://cdn.shopify.com/s/files/1/0437/9839/7085/files/tumirazewakaso.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/3956152307.pdf
    • https://cdn.shopify.com/s/files/1/0438/0724/4450/files/polizul.pdf
    • https://cdn.shopify.com/s/files/1/0429/0802/4985/files/57289460716.pdf
    • https://cdn.shopify.com/s/files/1/0437/8922/2045/files/lamowal.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9423/files/17410709575.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_off0001577c.bin
3acf2511a2a73871f1d830ccd656f82e03f00cb1a5ddfaac877de730adc9507a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1577C 5508 bytes
font_01_sfnt_off000169fa.bin
fd5dcd9ba48ff15015509b708a9a8eb28212cffbdeeb6baf7492f7788fe52a9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x169FA 2172 bytes
font_02_sfnt_off0001735b.bin
5ce583157d009474b8a49fe632d4075483dfcf956c117d98ccf9da678a0e1222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1735B 18400 bytes
font_03_sfnt_off0001ac84.bin
206b9ba5612b2cec5444d4f90f9df0cc078690c0e91cf5736f9d017b8f9db370		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC84 16524 bytes
font_04_sfnt_off0001c315.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C315 4324 bytes

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