Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccaee17af5cd583a…

MALICIOUS

PDF

59.7 KB Created: 2020-08-19 23:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd0010961dc828c41ba960bb5b58ec5f SHA-1: 17ea7793ff2840c2ee9712d47bec2e00d0628d56 SHA-256: ccaee17af5cd583a528c5045e44e3667423ba9831945a39cc7c60f089d564954
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The presence of a link to a known malicious redirector (ttraff.cc) strongly suggests a malicious intent, likely to lure users to malicious sites or to manipulate search engine rankings. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact payload.

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=lysistrata+analysis+pdf
    • http://tamegudu.liamprinter.com/uploads/1/3/2/6/132681352/2104076.pdf
    • http://files.coljohnbutleruel.com/uploads/1/3/2/8/132814624/9168718.pdf
    • https://cdn.shopify.com/s/files/1/0437/1457/6537/files/bovuvipidafopumipufizod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22650439267.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/39605468525.pdf
    • https://cdn.shopify.com/s/files/1/0435/1688/7192/files/62164382048.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/zagubefufikigadilakino.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6785/files/bozajijomesotuke.pdf
    • https://cdn.shopify.com/s/files/1/0428/5300/7526/files/brownman_revival_album_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9126/files/88196060100.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitadekekogog.pdf
    • https://cdn.shopify.com/s/files/1/0429/8768/4003/files/administrative_law_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/70816302397.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_off0000a502.bin
b8f2003ee3b66e1d756fbfaad795d5f2953497c862c61f8a09faa1e6e98f5cf0
pdf-font-stream PDF embedded font (sfnt) at offset 0xA502 5080 bytes
font_01_sfnt_off0000b660.bin
eb7e2c7f09b8d32724f5195a8f08ba7c783e4854206859128ad0d57f44c2e9f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB660 13208 bytes