Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5abff12ee31eaf…

MALICIOUS

PDF

123.4 KB Created: 2020-08-08 02:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1037c99bcb781843ba263801da8f2349 SHA-1: 30b1206925e87fff94c593b25009e0642abcebab SHA-256: 2e5abff12ee31eaf95b3b61b27e6956b43aa3cf039870251f47e49520f0b963f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. It also contains a mass external PDF link farm, with the primary redirector URL being https://ttraff.cc/pify?keyword=castellan+fundamentos+de+fisico+quimica+pdf. This suggests the document's primary purpose is to redirect users to malicious sites, likely for further exploitation or phishing.

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.cc/pify?keyword=castellan+fundamentos+de+fisico+quimica+pdf
    • http://files.evolvingpartnership.com/uploads/1/3/2/6/132695643/gunenimumaxudil.pdf
    • http://files.campmattakeesett.org/uploads/1/3/1/4/131406432/bavobomu-kerefudaz-fivebeje.pdf
    • http://pepag.laurajohnsonmarchisella.com/uploads/1/3/1/4/131452922/a65825cd69a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/95401398211.pdf
    • https://cdn.shopify.com/s/files/1/0431/1577/4108/files/history_alive_textbook_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/25105425214.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/73569090876.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/78726415334.pdf
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/wepevukikeziwivodipi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6794/6648/files/w3schools_html_tags_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/entrepreneur_magazine_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2070/files/winixovomuzibe.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/les_asymptotes.pdf
    • https://cdn.shopify.com/s/files/1/0429/6740/0601/files/zobawopivedokofiguberi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/red_blood_cell_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/43115717791.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000195d1.bin
2f6d0af9588473319c44f84e737ae8152aadc29675e23983d5a57c526b1b6627		 pdf-font-stream PDF embedded font (sfnt) at offset 0x195D1 5236 bytes
font_01_sfnt_off0001a790.bin
3ff8eb1bb6ca5990a636cc24b5fa9bf36828f4686621b425f31ee09915b287fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A790 18644 bytes

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