Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea707fbc66fe1ca…

MALICIOUS

PDF

55.5 KB Created: 2020-08-26 11:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29044cb3a8a5d32ccad1a9f857b7eec3 SHA-1: a199988a5dd6751cb9fb3c8bb3fd32903244bc76 SHA-256: 3ea707fbc66fe1ca56f738ca216a3a1fec19b92f2fd46275b26bb0ba300f9164
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination. The document body contains text related to 'Ys 8 chapters' and numerous embedded URLs, many pointing to Shopify domains, suggesting a link farm or content redirection strategy. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to malicious infrastructure via a deceptive link.

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=ys+8+chapters
    • http://files.thistallawkwardgirl.com/uploads/1/3/1/4/131453496/21e7831b1b.pdf
    • http://xedokamiv.lisanegronnarrates.com/uploads/1/3/0/8/130874019/91f84819c0.pdf
    • http://lelog.gracesaunders.com/uploads/1/3/1/3/131380086/nolisefadanexu-pijafej-puxitejomegag.pdf
    • http://files.martypurdy.com/uploads/1/3/1/1/131163834/nozavu-mukakiv-siximemeni.pdf
    • http://donaf.performancedobermans.com/uploads/1/3/2/7/132740905/xelipir.pdf
    • https://cdn.shopify.com/s/files/1/0440/5143/1574/files/tidamopirogisukit.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/tiwixodevijaxamis.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/wetixojegomodoja.pdf
    • https://cdn.shopify.com/s/files/1/0431/8786/3715/files/47838537498.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/38802756290.pdf
    • https://cdn.shopify.com/s/files/1/0447/7625/9735/files/absorption_of_carbohydrates_proteins_and_fats.pdf
    • https://cdn.shopify.com/s/files/1/0464/0948/2408/files/poker_cheat_sheet_black_rain.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/benedicto_xvi_deus_caritas_est.pdf
    • https://cdn.shopify.com/s/files/1/0433/9426/9333/files/rutilito.pdf
    • https://cdn.shopify.com/s/files/1/0448/0575/0946/files/zan_s_minimap_mod.pdf
    • https://cdn.shopify.com/s/files/1/0439/6898/7294/files/inorganic_chemistry_miessler.pdf
    • https://cdn.shopify.com/s/files/1/0431/8760/1559/files/20731696620.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007358.bin
59872fd13047fb4094b51ab989d0db2e70f9f353699b93b341ab54c2f87b3102		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7358 12396 bytes
font_01_sfnt_off00009bf4.bin
7eabd852e450a1baa0377407245d5fbda685f4ff9241eda42474be0af63cdfc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF4 5144 bytes
font_02_sfnt_off0000ad6b.bin
7572203371216337dab952e786d7904d926367558eb7f29ce03513a521b53620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD6B 10636 bytes

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