Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2bc5590c5ed0d0…

MALICIOUS

PDF

45.0 KB Created: 2020-08-19 09:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e8a5574719f9d9a585d3146cc56ce72 SHA-1: b20105a1dfcacb9baa624ec09d19017b230188c6 SHA-256: ea2bc5590c5ed0d07aabac90eed264a5f0cf26f422ae98094c347d46e415612f
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=pubg+tencent+buddy+emulator'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to trick the user into visiting this malicious site. 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.cc/pify?keyword=pubg+tencent+buddy+emulator
    • http://files.nextplus.com.my/uploads/1/3/1/4/131453031/pikozu-sevewaxatejave-gedej-xawuzak.pdf
    • http://files.macarthurjrotc.com/uploads/1/3/0/9/130969310/jexoladuzisami.pdf
    • http://sudozugij.waytolifefoods.com/uploads/1/3/1/1/131164250/tuxudaburapez_bulunow_ditujugefu.pdf
    • http://muzani.koncreteflava.net/uploads/1/3/0/7/130739615/a0105c932fc1.pdf
    • http://files.voltaassociates.com/uploads/1/3/0/8/130814858/punivokakosike-dolatilo-vopij.pdf
    • https://cdn.shopify.com/s/files/1/0434/0885/1098/files/wugifabuwod.pdf
    • https://cdn.shopify.com/s/files/1/0434/4378/1788/files/14868075365.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2023/files/tonaxaba.pdf
    • https://cdn.shopify.com/s/files/1/0428/5395/7799/files/50494896794.pdf
    • https://cdn.shopify.com/s/files/1/0449/7299/8815/files/sujet_brevet_blanc_maths_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/27216105688.pdf
    • https://cdn.shopify.com/s/files/1/0438/6213/0853/files/egypt_pestel_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/bigizegexoruturapejigi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0492/7905/files/aleister_crowley_libros.pdf
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/pevoxemuvudowimewa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/aranto_cancer.pdf
    • https://cdn.shopify.com/s/files/1/0439/3595/7147/files/actuarial_mathematics_for_life_contingent_risks.pdf
    • https://cdn.shopify.com/s/files/1/0434/6796/4580/files/wuluxefevudizinobekal.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_off00007205.bin
05c34f12bdd2dfd5f4740569b454e5f5e7146c1d708f475254257ef769421e40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7205 5324 bytes
font_01_sfnt_off00008400.bin
355fd37bb356486ff6f73d2b6dc1b57d1adc27ccfe237d8a6564c8beb4abe5f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8400 10156 bytes

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