Malicious PDF — malware analysis report

Static analysis result for SHA-256 7727772b365d70cf…

MALICIOUS

PDF

59.3 KB Created: 2020-08-04 17:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f111a45b148739e30e3bddd27ea7f8f2 SHA-1: 18da86757a3045b22dcad5ec4a887cfcc7c318cd SHA-256: 7727772b365d70cf3ce08c684dccedcd37838555c253ca136a3cea266cb0e509
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the target URL and several other Shopify-hosted PDF links. This suggests the primary goal is to lure the user to a malicious site, 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.ru/pify?keyword=solid+waste+management+system+in+ethiopia+pdf
    • http://files.dcsportshall.com/uploads/1/3/1/8/131872087/9328820.pdf
    • http://files.photographybycarrie.co.uk/uploads/1/3/0/8/130874240/kuxefelironixuda.pdf
    • http://files.webbrhp.com/uploads/1/3/0/9/130968996/jovuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0436/7027/4201/files/6762516143.pdf
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/xuxuvabezavoxewuxizofaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/banuki.pdf
    • https://cdn.shopify.com/s/files/1/0433/6307/4213/files/baxaweriwux.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/katezez.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/giweme.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/sedov.pdf
    • https://cdn.shopify.com/s/files/1/0432/0401/8336/files/dekaxekewizemusazok.pdf
    • https://cdn.shopify.com/s/files/1/0438/0911/2226/files/read_catching_fire_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/45010398800.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_off00009fcd.bin
0eb2092932b425c5623931acb4d1b5ef6d2eb54d2b7c390cdd5a61f0b476eaa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FCD 5656 bytes
font_01_sfnt_off0000b2ff.bin
683901a46c046c2351966f73e63a26843b8026f1d9db59ea93c9b8ccb7318307
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FF 14788 bytes