Malicious PDF — malware analysis report

Static analysis result for SHA-256 111be5abada00083…

MALICIOUS

PDF

45.2 KB Created: 2020-08-12 09:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9581f7aaa72cb3d1af511c3bf5df1a5 SHA-1: da6c2955a8c503947f229fc08284e00c3ab5ea1b SHA-256: 111be5abada00083427d9bdf059629685e3b0cd00c1608223946ced60ca1495f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=atal+pension+yojana+pdf+sbi'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of malicious redirector links and the link farm structure strongly suggest an attempt to lead users to malicious content, 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.com/pify?keyword=atal+pension+yojana+pdf+sbi
    • http://files.consciousrites.org/uploads/1/3/0/7/130739789/f1e23607bb225fe.pdf
    • http://nekag.marwinvizslas.com/uploads/1/3/1/4/131454012/gekudidimub-jatebukoguv-viviwumevexofe.pdf
    • http://files.nexacreativeconsulting.com/uploads/1/3/1/8/131871970/jekedivuwudawa.pdf
    • http://files.theperfectshipping.com/uploads/1/3/0/9/130969218/fe9bc537178dc.pdf
    • http://files.tracimartino.com/uploads/1/3/1/3/131380786/fijovur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/min_heap_java_implementation.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/wepofifalarudapodemisade.pdf
    • https://cdn.shopify.com/s/files/1/0434/6216/4644/files/90542607908.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/antonin_dvorak_biografia.pdf
    • https://cdn.shopify.com/s/files/1/0429/1356/2787/files/32900256241.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/pdf_to_word_converter_apk_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/9975/4397/files/banana_fish_manga_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/saxunabejid.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/77625649614.pdf
    • https://cdn.shopify.com/s/files/1/0434/7192/9496/files/cvc_words_with_pictures_flashcards.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/dufufipameludivusebusad.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_off000072dc.bin
3204de90e9932d9b85662c656897b38aa78b0ddec1d720237cae1f815be931c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72DC 5244 bytes
font_01_sfnt_off000084cb.bin
1e12c1a0cec6e887e0f4b177bb7421d3d04ea5dbac6f197fc60c74ec3c7d0620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84CB 10228 bytes

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