Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6f22908baabfdc…

MALICIOUS

PDF

54.0 KB Created: 2020-08-02 12:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd814d0c64ad8f47bc8126c27a211aab SHA-1: e267ed67cb79be0693d4f9c2ca19690de025d72b SHA-256: 9c6f22908baabfdc7aa7401f4c16c9954af45915e07587525fbbf76958e00631
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. Additionally, it contains a large number of embedded links, many of which point to a link farm hosted on Shopify. These links likely serve to obscure the final malicious destination and potentially improve search engine ranking for malicious content. The ML classifier also strongly indicated maliciousness.

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=around+the+world+daft+punk
    • http://files.menashastrong.com/uploads/1/3/2/3/132303010/396424a5.pdf
    • http://files.thehubwoolavington.co.uk/uploads/1/3/1/4/131406060/vafuwegili-ragamarikamed-sikirudetut-xekuxafibex.pdf
    • http://files.beautiful-astrology.com/uploads/1/3/1/3/131397964/ea95b6f3ae15ca0.pdf
    • http://files.dancestudiesuoft.ca/uploads/1/3/2/6/132681062/pekirijo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/48220163780.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/wolozela.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/71469564899.pdf
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/81477205239.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8770/files/pipajagozubigodawinizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/lerunom.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/51669475207.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/ncees_handbook_9._4.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/zifekotimuwexugolali.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/93594949255.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0096/files/nusijewulerizodofufexuzu.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_off00008775.bin
b3aa5be5752fbe4397e209e40b2440dbc9f889b852454645197c7f31dd861cf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8775 4928 bytes
font_01_sfnt_off0000983e.bin
f0b35acf15ed185317dbf330d4854de7b7d5356a737b047715fa7ed57e3f1437		 pdf-font-stream PDF embedded font (sfnt) at offset 0x983E 10728 bytes
font_02_sfnt_off0000bcd0.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD0 4324 bytes

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