Malicious PDF — malware analysis report

Static analysis result for SHA-256 b55e52536528b63a…

MALICIOUS

PDF

47.0 KB Created: 2020-08-18 20:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec629c0ea093264a2987fb05f180d9d7 SHA-1: f12770df5e2627ba21d49b29e8cff632c5b0c634 SHA-256: b55e52536528b63aaa4960751ec5126b00cca92ca1ab3c0cffb494a37fa2f689
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=bulave+tujhe+ringtone++pagalworld', likely leads to a phishing or malware distribution site. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains hosting other PDFs. The ML classifier strongly supports the malicious nature of this document.

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=bulave+tujhe+ringtone++pagalworld
    • http://lamironi.denny-divinelanguage.com/uploads/1/3/2/8/132815732/c058ac321.pdf
    • http://roxig.punchslidedesign.com/uploads/1/3/1/6/131606069/ac61781ed9787.pdf
    • http://ketofewi.birthservicesbykristin.com/uploads/1/3/1/4/131454106/rujav-momubax.pdf
    • http://pazit.dancersmovementlab.com/uploads/1/3/0/8/130874278/2777fcc704efd5.pdf
    • http://files.bearclawepic.com/uploads/1/3/2/6/132681356/16c3d11d130a.pdf
    • https://cdn.shopify.com/s/files/1/0432/2348/2530/files/libros_de_calidad_total_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/43518737875.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8886/files/descargar_cetusplay_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/5266/1912/files/10379623624.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2650/files/76324469427.pdf
    • https://cdn.shopify.com/s/files/1/0432/6909/5590/files/vanejo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/define_central_tendency.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/75973818263.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/lasiraranemipurojapixen.pdf
    • https://cdn.shopify.com/s/files/1/0428/5267/9836/files/35154413647.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/transmissions_element_120.pdf
    • https://cdn.shopify.com/s/files/1/0438/5649/4757/files/82083585189.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058bf.bin
a1788215b3ed6639705815b1b316b367a990af7d3f9f00cb3ff63052814208d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58BF 5200 bytes
font_01_sfnt_off00006a80.bin
cebc4dbcbbcb66f0527a8a1ca649991f1aeb1fc9dabf2ab44c385220c2575a1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A80 9768 bytes
font_02_sfnt_off00008bf4.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF4 4324 bytes
font_03_sfnt_off000099f5.bin
50f0298cab881dc8c11421a73df7d13f6e5821b87fd5d452445930583761e32b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99F5 5716 bytes

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