Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49094a4e74b6556…

MALICIOUS

PDF

48.0 KB Created: 2020-08-25 05:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bb4382cc2d469364acfc07ec376913a SHA-1: dd9fd4c73a462fbbe87f0ec77cf90bf736862390 SHA-256: e49094a4e74b6556f5044e264cf9874c665c47b6201ea81d5f14d93c413241f1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=wiki+episode+guide+the+good+place'. The document body, though partially corrupted, also contains this URL, suggesting a lure to a malicious site. The presence of numerous Shopify links, while some are benign, likely serves to obscure the malicious redirector among legitimate-looking content.

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=wiki+episode+guide+the+good+place
    • http://nexif.carolparriskrausspoet.com/uploads/1/3/1/0/131070450/vumuparagab.pdf
    • http://files.jaseelectrical.com/uploads/1/3/0/9/130969926/eab7430.pdf
    • http://kabegafod.northvicgps.com/uploads/1/3/0/7/130740117/nuwuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/54143067079.pdf
    • https://cdn.shopify.com/s/files/1/0437/3161/5909/files/29439383024.pdf
    • https://cdn.shopify.com/s/files/1/0434/9558/8002/files/azhage_azhage_song_wapwon.pdf
    • https://cdn.shopify.com/s/files/1/0436/4127/4521/files/nabituv.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/cardiotocography_interpretation_nice_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/6172/2786/files/life_goals_list_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/difewodamavorile.pdf
    • https://cdn.shopify.com/s/files/1/0434/7022/5558/files/26994195132.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/fidelity_global_dividend_fund_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/bojidagugaviramajufaxebij.pdf
    • https://cdn.shopify.com/s/files/1/0434/1668/2652/files/brahms_symphony_1.pdf
    • https://cdn.shopify.com/s/files/1/0464/6794/0504/files/pilefapelad.pdf
    • https://cdn.shopify.com/s/files/1/0448/5467/3569/files/calculus_and_its_applications_expanded_version.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_off00007523.bin
a8b29979871830d9c3e3fd2d9a9d6fc5697c9b440a8a940d9749682c56eeb011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7523 5316 bytes
font_01_sfnt_off00008740.bin
071f95f892c2607af50c9db45c284ba7b17149f5cb1d7c7b8d1bc4d5204de62c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8740 14200 bytes

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