Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f6332f4aabae6e…

MALICIOUS

PDF

54.0 KB Created: 2020-08-22 13:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12193efc892a731380e859a4458ae694 SHA-1: a9433645baea8edb9a5b90c9a21dd7ce24fd2248 SHA-256: 54f6332f4aabae6ea13640d3ac9ebe6deabd771d13d7513d9d9ee6f4db7139d5
152 Risk Score

Malware Insights

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

The PDF contains a deceptive lure related to a fishing report, which embeds numerous links. One critical link, https://ttraff.cc/pify?keyword=silver+lake+amador+county+fishing+report, points to a known malicious redirector. The document also functions as a link farm, directing users to a large number of SEO-optimized PDFs hosted on Shopify, likely to obscure the malicious intent and distribute traffic. The ML classifier strongly supports the malicious nature of this PDF.

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=silver+lake+amador+county+fishing+report
    • http://files.thehipjipsy.com/uploads/1/3/2/6/132696512/wudumureno-jipelajejilifa-femoma-gomopiwo.pdf
    • http://files.traceynjohnson.com/uploads/1/3/1/0/131069887/saxex.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/20785635927.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/50498889920.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/the_psychology_of_rumor_gordon_allport.pdf
    • https://cdn.shopify.com/s/files/1/0432/8164/5736/files/24215164757.pdf
    • https://cdn.shopify.com/s/files/1/0429/1375/9395/files/anatomy_and_physiology_textbook_for_nurses.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/74981334223.pdf
    • https://cdn.shopify.com/s/files/1/0428/6201/8727/files/wokadekeriku.pdf
    • https://cdn.shopify.com/s/files/1/0443/2376/6428/files/16402834171.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/ibps_recruitment_2019_application_form.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_off000077d9.bin
877867590ccb5744a89f64e714225778fd911b41d154a133938b2bd99492e8f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x77D9 5780 bytes
font_01_sfnt_off00008b60.bin
05803a0b922875a433ffa57119ff9ebfa83eae5c0b38e576a6d859c66670873d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B60 16080 bytes
font_02_sfnt_off0000bd41.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD41 4324 bytes