Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14e7f55e66d717b…

MALICIOUS

PDF

50.2 KB Created: 2020-07-30 04:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3d28dd941c8ce362a6e35859c591f51 SHA-1: cba99cbf66356bcfecfe8b7d3c183ca0a990e73f SHA-256: c14e7f55e66d717bb3544dc89c755c86331aac6ddf177d8e65c7a1eab3cb5136
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=how+to+swing+trade+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=how+to+swing+trade+pdf
    • http://files.urbanmarketturlock.com/uploads/1/3/1/4/131454560/mokefulexe_kozizidabivoma.pdf
    • http://files.bosma-lab-uw.org/uploads/1/3/1/8/131858540/gipuvasovibaj.pdf
    • http://files.colourismyworld.com/uploads/1/3/2/7/132710697/xazofuzales.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3351/files/52280739304.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/wafufededojuzirug.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6558/files/94499321653.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/18246130223.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/4283208440.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/66960143861.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufotiniponekurek.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/67722151657.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofusibosaduxigagixuvoma.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8024/files/ziwodetobegebi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4772/1892/files/xeketipazajedogok.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/54978933940.pdf
    • https://cdn.shopify.com/s/files/1/0431/5178/6145/files/52999422214.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_off000085ab.bin
e5f637f504b90a174c081347c138dcc2df1f4febd6bd6f38bfdda2bc1a8f04d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x85AB 5020 bytes
font_01_sfnt_off000096d5.bin
c4589a4cf744318626edbf1104a183f201ff7866322bfd878744a03f8d450cd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x96D5 10916 bytes