Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee3f780c29d79d3…

MALICIOUS

PDF

43.1 KB Created: 2020-08-06 23:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 395a55df2c017d82b2f76246a71ae1e5 SHA-1: ee90b673d44e2b8ad4539dfb4d55b9ada0381207 SHA-256: 8ee3f780c29d79d31c0f98fde948605059f8208f8c9fd5b5ec68f2f280085fd7
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though obfuscated, contains text related to a 'secret forex hedging strategy' and includes the malicious URL. This suggests the document's primary purpose is to trick users into visiting the malicious URL, likely for phishing or malware distribution.

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=secret+forex+hedging+strategy+pdf
    • http://files.ferrumwood.com/uploads/1/3/0/7/130739225/3fdfd4914.pdf
    • http://files.hilinehoopcamp.com/uploads/1/3/0/7/130739651/jirenitawijuw.pdf
    • http://files.littlepampuandcbinc.com/uploads/1/3/0/7/130776858/daxidimupuvafakulese.pdf
    • https://cdn.shopify.com/s/files/1/0430/3051/1779/files/66840817761.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3979/files/78256352958.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/webomobituwisumepepaxifi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8561/8583/files/sifedojug.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5377/files/lariwitufewidavik.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/fazixisewuzujopezujamop.pdf
    • https://cdn.shopify.com/s/files/1/0433/5337/4874/files/xuvipixovegirukirewo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/ririrusonevixelosi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7527/2855/files/asymmetric_information_journal.pdf
    • https://cdn.shopify.com/s/files/1/0434/7897/4629/files/44._49085_73._22798.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/biwotixuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/fukanovisevegifaganitab.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_off00006874.bin
a8c76a0a24f39f5f01f3c1f6d2f4a4d19ae0ca1bd1c198d52c92c90de3ec6039
pdf-font-stream PDF embedded font (sfnt) at offset 0x6874 5656 bytes
font_01_sfnt_off00007bc2.bin
5fb4f635f7218a053c86f3941b9d137453664c059f404ebb4604efd4d6727829
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC2 10496 bytes