Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84a276a442b346e…

MALICIOUS

PDF

57.0 KB Created: 2020-08-03 10:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4709658b36ccb4aafa6bdfeb4407afb SHA-1: eeec72ea594cddf1c0afea3732c7848851a2519f SHA-256: e84a276a442b346e2891249d69518dcd8de574db5b43f66538f8e8d5041ddb58
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=how+to+print+something+out+in+tkinter'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0427/4615/1078/files/mimetanokutumovuxisurezu.pdf'. The document body, though partially corrupted, contains the same URL, suggesting the primary intent is to trick the user into visiting a potentially malicious site.

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=how+to+print+something+out+in+tkinter
    • http://files.teacherbehn.com/uploads/1/3/0/7/130776081/jojewujabejepolipa.pdf
    • http://files.cherrywhipple.com/uploads/1/3/2/3/132303061/vabufu-levirivesimol.pdf
    • http://files.1932auburnsedan.com/uploads/1/3/0/9/130969548/61762a68.pdf
    • http://files.teensvillerecords.com/uploads/1/3/0/7/130775373/8dd18b1784e2.pdf
    • http://files.christianclergyinternational.org/uploads/1/3/2/6/132682230/zelamonebaxi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/mimetanokutumovuxisurezu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5884/6109/files/17079076209.pdf
    • https://cdn.shopify.com/s/files/1/0437/3548/2517/files/1982_honda_goldwing.pdf
    • https://cdn.shopify.com/s/files/1/0431/0096/2977/files/kanebaxupelufus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2760/3354/files/36844685721.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/gapewefazupap.pdf
    • https://cdn.shopify.com/s/files/1/0439/2160/4763/files/23566591865.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/liwukepurenugiweda.pdf
    • https://cdn.shopify.com/s/files/1/0428/3216/7068/files/zofujoninir.pdf
    • https://cdn.shopify.com/s/files/1/0446/0986/3843/files/soni_ericsson_w580i.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/mabutoxotikefigij.pdf
    • https://cdn.shopify.com/s/files/1/0429/1539/7788/files/59116998048.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/galoluzefejoru.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_off000093e7.bin
a20c25bb290513e97f66f82ad5805989160255404071f5115d2609a88d8ba110		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93E7 4988 bytes
font_01_sfnt_off0000a4c3.bin
17e6721d878cb2c819e8a20a98c797d78ef3a6caf79602122c7df4f3c2e3f953		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C3 10376 bytes
font_02_sfnt_off0000c837.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC837 4324 bytes

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