Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ac852f79e9f0bb6…

MALICIOUS

PDF

46.2 KB Created: 2020-08-08 08:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97a9cfb4a5bb056d48bc21a29c7622ed SHA-1: 8bbd46eb67c39d7fcde29d55ab63a27b3d4cda9c SHA-256: 8ac852f79e9f0bb628391aa6889ef58f074fa268ccd09a04cd266730410d279a
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=adverbs+of+time+%25C3%25BCbungen+pdf', which is designed to lead users to potentially harmful content. The presence of a link farm heuristic further supports the malicious intent of directing users to external sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=adverbs+of+time+%25C3%25BCbungen+pdf
    • http://gamija.wharfemporium.co.uk/uploads/1/3/2/6/132680813/vepoz.pdf
    • http://buxizaga.busybeesrathkeevin.com/uploads/1/3/1/4/131438405/9a808943ed5c1.pdf
    • http://luxobi.jihyunhong.com/uploads/1/3/1/3/131383483/noxirale.pdf
    • http://files.jewelrymm.com/uploads/1/3/2/6/132695832/fe6d08d5f7.pdf
    • http://files.bangalowclinicalpsychology.com.au/uploads/1/3/2/3/132302847/kimanomewina.pdf
    • https://cdn.shopify.com/s/files/1/0436/8472/4889/files/butir.pdf
    • https://cdn.shopify.com/s/files/1/0432/3734/3387/files/28197188132.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4708/files/velibiwud.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/83318297297.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/arpeggio_jazz_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2654/files/kuzor.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/kuwatugefemoluninup.pdf
    • https://cdn.shopify.com/s/files/1/0435/9208/9763/files/best_video_converter_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/taste_of_ink_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0293/files/convert_file_to_cdr_format_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/d_letter_names_for_girl_hindu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2741/files/liloni.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1219/files/notowoxi.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_off00006423.bin
225e0b66f26c8f8ea7e791163017368d419f92b80aea3f49539b36d5b0a7d878
pdf-font-stream PDF embedded font (sfnt) at offset 0x6423 5308 bytes
font_01_sfnt_off000075e2.bin
9cc0ab2bf00a31990df46b6a7c5d83a6b511b2d7df96e67bb600afcb191581b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E2 11632 bytes
font_02_sfnt_off00009bef.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BEF 4324 bytes