Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f59f50ef18d90ec…

MALICIOUS

PDF

47.7 KB Created: 2020-07-25 11:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c1982bff4c2e03ac5d11de02105b38e SHA-1: c8cc3b5fd51fed952b56228194ad97ba28a954b3 SHA-256: 1f59f50ef18d90ec3a5fa04b14997bb62bfd962268a2a5aebb0e58b1062bf2ac
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. Additionally, it contains a large number of external links, many hosted on Shopify, forming a link farm. The primary malicious URL identified is ttraff.cc, which likely serves as a gateway to further malicious content. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact lure.

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=alison+roman+chicken+sheet+pan
    • http://files.allcomersmusic.org/uploads/1/3/1/4/131408103/43c2182d5883afe.pdf
    • http://files.lisapellingdietitian.com/uploads/1/3/1/8/131857465/0bfb61f.pdf
    • http://files.ruberybookaward.com/uploads/1/3/1/3/131384306/98c13b.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/36332005023.pdf
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/15790222641.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/wikorepoboxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7878/6965/files/zizakuzasomupexi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/dutidupafukemogutozuma.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/wolofa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2667/files/podow.pdf
    • https://cdn.shopify.com/s/files/1/0432/4845/1739/files/pujubipalutofu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/64192447847.pdf
    • https://cdn.shopify.com/s/files/1/0437/9970/7810/files/46858773854.pdf
    • https://cdn.shopify.com/s/files/1/0437/7260/8663/files/83937627227.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/dosizixuzozefelo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/86704110926.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_off00007e40.bin
77cdbd86f2a17288ac9b48e66d8c57af711982b56c2b954fdca6b493add4a30b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E40 5012 bytes
font_01_sfnt_off00008f06.bin
5b452d90cf3e4cbcf282da1cb7a5cfa86e4708a68889fc7afd57ad17adf2cdac
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F06 10008 bytes