Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b28c1dad88f2916…

MALICIOUS

PDF

58.2 KB Created: 2020-08-26 15:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e25859dbee31e8400ea147e05e52d4fc SHA-1: 4e1420f16663e7109ec25a6dcf50a4a88b7549c1 SHA-256: 3b28c1dad88f291611a416a8f2223696be399450599f83428ad7c107238b30a4
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, though obfuscated, contains the target URL and references to sheet music, suggesting a social engineering pretext. The presence of a large number of external PDF links, many pointing to Shopify, indicates a link farm designed to improve SEO for the malicious redirector.

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=imperial+march+sheet+music+piano
    • http://vivave.donjitsudodojo.com/uploads/1/3/1/4/131453197/wapixiduvanitigom.pdf
    • http://rolelulu.bsmpoa.com/uploads/1/3/1/6/131636664/3842069.pdf
    • http://files.ziontbc.com/uploads/1/3/2/7/132712006/7271f85739e04.pdf
    • https://cdn.shopify.com/s/files/1/0462/3669/6736/files/73233493525.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5383/files/82442684271.pdf
    • https://cdn.shopify.com/s/files/1/0433/2247/4651/files/tukapaka.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/lavivotamotulawigobel.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/42735477126.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/2001_ford_focus_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5011/3943/files/bevel_gear_design.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/bexano.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/95192760322.pdf
    • https://cdn.shopify.com/s/files/1/0439/8078/3774/files/how_to_find_angle_between_two_vectors.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008675.bin
1c45ae965081101187260ee0301d40b4e3d12d29f5343a822c4eee2c9ac0513e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8675 4540 bytes
font_01_sfnt_off00009630.bin
e41391f641ab82be8951539abdc8ac96b9d91147923229fb9a3e59f86f1c6ce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9630 4992 bytes
font_02_sfnt_off0000a6ef.bin
924d598e06856bd708613f7bb92b7d3a0e00e27b4cb336c3b46fa9c6e2c84f65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6EF 11572 bytes
font_03_sfnt_off0000cd93.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD93 4324 bytes

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