Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc64424185d110bb…

MALICIOUS

PDF

47.9 KB Created: 2020-08-10 22:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13bcf86f6dfa5676736db639e4a3a854 SHA-1: abed86c2ebc7b5a9859f450ac68827c3884ba1db SHA-256: fc64424185d110bb9d0e1b68dc22eed29fa5c214e6513443de36cccb58cf4cb0
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially garbled, includes text suggesting a lure related to 'bug bounty hunting methodology'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. No scripts were extracted, and the PDF structure itself is the vector for the attack.

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.com/pify?keyword=bug+bounty+hunting+methodology+v2+pdf
    • http://zaboru.merakiandcoffee.com/uploads/1/3/2/6/132682137/kamumolonike.pdf
    • http://files.blainevdg.com/uploads/1/3/2/7/132740665/fulajusomatamaxopiwe.pdf
    • http://files.santafedatahub.com/uploads/1/3/0/7/130775387/7027310.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/48171050663.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/93066835686.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/95044636164.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/tarkan_du_du.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/numevapifarufisaruva.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/danidafamomumawaliz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5366/2883/files/95196172741.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/wilejunabepudix.pdf
    • https://cdn.shopify.com/s/files/1/0433/1703/5166/files/zonebobabuti.pdf
    • https://cdn.shopify.com/s/files/1/0431/9290/9987/files/collins_scrabble_words.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/exercises_on_present_simple_vs_continuous.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/jiratotabewenulenawudi.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_off00006bde.bin
e8837441a1d43d0c57bac4caac048abdb5eb87a00eda05465f6270b199f81706
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDE 5452 bytes
font_01_sfnt_off00007e59.bin
7bd0261fe0ed0ca982c7d6fa8a387d7a422104a02816e07ea99a9b03f44b626a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E59 16136 bytes