Malicious PDF — malware analysis report

Static analysis result for SHA-256 721f47169e2a4230…

MALICIOUS

PDF

51.0 KB Created: 2020-08-19 20:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2910edc2d393a2dbcfea8d9ee69ee90b SHA-1: f71807e5e1b59c96e98a2b79f8733222fa578097 SHA-256: 721f47169e2a4230aaeec431384ce9f148f4fd6adf3620e933882f8a4d369d94
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with the primary one leading to a known malicious redirector. The document body, though heavily obfuscated, contains text related to movie songs and the malicious URL, suggesting a lure to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=bhaubeej+marathi+movie+songs+free
    • http://files.labyrinthcreations.com/uploads/1/3/0/9/130969543/7674498.pdf
    • http://veliwal.whitbybrooklinprobus.com/uploads/1/3/2/8/132814930/d5ba6a4ee9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/8547/7541/files/libasazufokadu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/gibukegapomokosex.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/rijuxonisarujowasive.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/87135316304.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/56794052004.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wudivilijekeroleve.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/kileluvenatogonojima.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4435/files/fapikotevelulamurasi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.pdf
    • https://cdn.shopify.com/s/files/1/0440/8125/0469/files/android_stored_wifi_password.pdf
    • https://cdn.shopify.com/s/files/1/0432/4317/6091/files/xagirovowumorip.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/adobe_acrobat_reader_pro_trial.pdf
    • https://cdn.shopify.com/s/files/1/0438/9502/9915/files/benafapimegosex.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f83.bin
ead69c27e33701ba638807e053fa4d7e2cc09bd2044e3acca4e8e8d8c66b8cf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F83 5476 bytes
font_01_sfnt_off00009214.bin
7b10d6e14e67a986d4464083e5a180c4037c93c4cd7e878378fe5c96f5d39b73
pdf-font-stream PDF embedded font (sfnt) at offset 0x9214 14592 bytes