Malicious PDF — malware analysis report

Static analysis result for SHA-256 186907d6f9e645ed…

MALICIOUS

PDF

85.9 KB Created: 2020-09-16 14:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dbeb003f3ae2f8f647315b730086c45 SHA-1: 27f4afb1d710a03b19f3481cf35ed18e0f6d3920 SHA-256: 186907d6f9e645edaa9f4f18b6cd5f0ccf1a79d77a56c471f73446fd1799a4a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The document also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, supporting the presence of malicious links.

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.link/wix?keyword=tera+mystic+ep+guide
    • http://files.mingocarecbd.com/uploads/1/3/0/7/130740118/2810638.pdf
    • http://files.myhealthsupplies.co.uk/uploads/1/3/1/3/131380029/xesudulafenoxe.pdf
    • http://regak.teachertalkstruth.com/uploads/1/3/0/7/130775735/7018198.pdf
    • http://wepowuri.hypefit.co.uk/uploads/1/3/1/3/131378852/tetovid.pdf
    • http://repire.phonecharmed.com/uploads/1/3/1/4/131438869/kofudugalom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0488/1645/5845/files/99854204590.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/xidatuzotikina.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2957/files/jamalife_helpers_global_compensation_plan.pdf
    • https://cdn.shopify.com/s/files/1/0463/3863/7981/files/hand_drawn_photoshop_action_free.pdf
    • https://cdn.shopify.com/s/files/1/0467/8169/4105/files/57677829384.pdf
    • https://cdn.shopify.com/s/files/1/0462/3908/8794/files/adivasi_gana_nagpuri.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8664/files/27847907045.pdf
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/89128435285.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/vevixemameren.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3294/files/airline_manager_2_apk_mod.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/worshipped_or_worshiped_spelling.pdf
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/dewozigilo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8316/2019/files/online_sniper_games.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/katolimewofafazawupozokar.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_off0001142c.bin
3bc24f8528800f40acda9a91d75d7ddeca32930ee3d1f172bb0d93240457e63d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1142C 5412 bytes
font_01_sfnt_off00012687.bin
203bcef77635e899e917fcedebff4fac6e8e8c0cd1f2364ab643a2c802883155		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12687 10540 bytes

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