Malicious PDF — malware analysis report

Static analysis result for SHA-256 279f83d82c62cfcc…

MALICIOUS

PDF

53.2 KB Created: 2020-08-06 04:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54809922d387b3a59aaa8a6c7f16f1c4 SHA-1: 196860d40c614dfc7850fb9f59a10de1b4cc12e3 SHA-256: 279f83d82c62cfcc5065cd76e9b2d85d23ec484ab7ff52d59ecd9ad72b53f0bd
120 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, with a critical heuristic firing indicating a link farm. One of the primary links points to a known malicious redirector, 'ttraff.cc', which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=geometric+rotations+worksheet+pdf', suggesting a lure related to 'geometric rotations worksheet'. The presence of numerous links to external PDFs, many hosted on Shopify, indicates an attempt to create a broad attack surface or SEO manipulation for malicious purposes.

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=geometric+rotations+worksheet+pdf
    • http://files.avic2020.org/uploads/1/3/2/6/132695242/povemilolubip-balowakeral-mesewinigojisux-wefonafadu.pdf
    • http://files.ztodorova.net/uploads/1/3/2/6/132681513/7645234.pdf
    • http://files.trinitykeezletown.org/uploads/1/3/2/6/132695582/ragexa-ronexunaben-jazun-tiduruxutowom.pdf
    • https://cdn.shopify.com/s/files/1/0431/2272/0922/files/dragon_age_arcane_warrior.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/11863903748.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/35215148871.pdf
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/53797124618.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/lumewadavesazofoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/86107675184.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/nalapazonivesizitufo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/78463922530.pdf
    • https://cdn.shopify.com/s/files/1/0431/1030/1847/files/how_do_you_draw_a_heart.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fejatomamegebuwugibuvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/boxavedo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54344474436.pdf
    • https://cdn.shopify.com/s/files/1/0433/3617/1679/files/13163021239.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_off000084cd.bin
1184e81c1d718da0dbfa5fa7a0fca719f818a99cda863e4b1c4c061e0093bc6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x84CD 5336 bytes
font_01_sfnt_off000096da.bin
4923d3c228d141129809ce82c4cce021a3016f7313627038e5cfd477a8f3d730
pdf-font-stream PDF embedded font (sfnt) at offset 0x96DA 10216 bytes
font_02_sfnt_off0000b9a5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A5 4324 bytes