Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef06886cad05e0f…

MALICIOUS

PDF

46.7 KB Created: 2020-08-17 11:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38d7c3bae3164e5476028d6991db3dfc SHA-1: bdd0985d2209f7a2641d7e7a111fe2c2f303039d SHA-256: eef06886cad05e0f059be83876dc4035dd52f94636a88983e0045a755c514fc0
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to 'Google umgekehrte bildersuche android' and the malicious URL, suggesting a lure to a search-related phishing page. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to the ttraff.cc redirector.

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=google+umgekehrte+bildersuche+android
    • http://files.paraglidinginkorea.com/uploads/1/3/1/8/131857112/87b4e6264a60805.pdf
    • http://files.airporthoppermaynooth.com/uploads/1/3/1/8/131857465/retakozalogunewu.pdf
    • http://files.sirenastudio.com/uploads/1/3/0/7/130775197/vegewalomavozux.pdf
    • https://cdn.shopify.com/s/files/1/0432/0627/9323/files/panduan_penyusunan_dokumen_akreditasi_rumah_sakit_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/5430/8245/files/minecraft_how_to_make_grass_grow.pdf
    • https://cdn.shopify.com/s/files/1/0436/3429/4937/files/7477889007.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9645/files/fisuzigolimivi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/jenajoforasad.pdf
    • https://cdn.shopify.com/s/files/1/0431/3356/7125/files/begababekidavulelid.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/73599675792.pdf
    • https://cdn.shopify.com/s/files/1/0437/1798/4405/files/20872487274.pdf
    • https://cdn.shopify.com/s/files/1/0434/4014/4534/files/jidebamejiwuwexabet.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/vipuxodizenuriwanako.pdf
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/53364883274.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006925.bin
f6b8a1aaa1dd162937ebde6256df3e5e4f00ffd39d125d8f3bdaf2cc078cafe5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6925 5472 bytes
font_01_sfnt_off00007b9a.bin
8bf3dd2ff87ab32d5076e0f952d7cbd5f8bb35441631d35923954b9e6b575ed8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9A 11052 bytes
font_02_sfnt_off00009fca.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FCA 4324 bytes