Malicious PDF — malware analysis report

Static analysis result for SHA-256 274b747ae8ab4219…

MALICIOUS

PDF

34.9 KB Created: 2020-08-12 08:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48d0c755118d6ab3084e135e604d84bf SHA-1: f656bf06eaf9362fc251c34413a75044819cc462 SHA-256: 274b747ae8ab42190b9e4191ad91fe50cdbaa895d3b4226273b87c80d7b0b6ed
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link farm and a malicious redirector. The document body, though heavily obfuscated, contains the string 'candleberry books pdf' and the malicious URL, suggesting a lure to a malicious site. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

Heuristics 3

  • 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.
  • 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=candleberry+books+pdf
    • http://files.bfmeals.com/uploads/1/3/0/9/130969580/mixiposesutit.pdf
    • http://files.billyburkefans.com/uploads/1/3/1/4/131413718/lasevax_kemum_zopawuxumodajes.pdf
    • http://files.fellowshipmsc.com/uploads/1/3/0/8/130873718/08b0dc4461757.pdf
    • https://cdn.shopify.com/s/files/1/0436/7125/7241/files/wordly_wise_3000_book_7_lesson_2_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/72264633837.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/neduvasakuge.pdf
    • https://cdn.shopify.com/s/files/1/0447/5686/1077/files/pro_bnp_cardiologia.pdf
    • https://cdn.shopify.com/s/files/1/0436/1083/3058/files/79564224364.pdf
    • https://cdn.shopify.com/s/files/1/0431/8517/6736/files/87440363232.pdf
    • https://cdn.shopify.com/s/files/1/0438/5426/6533/files/73008574763.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/soxolosalupozomivetipod.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/vumijalulix.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/english_articles_a_an_the_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/9704/6696/files/jogopanubod.pdf
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/86914140228.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_off00004988.bin
7ec9947d96b0374903ea55459194c07f23eb7797484fecaade8cb7c23b3d0e2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4988 5244 bytes
font_01_sfnt_off00005b69.bin
e7c62cbe12db46e3d722ff6b5573ea953102741646b989db2585a492925d9c80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B69 10424 bytes

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