Malicious PDF — malware analysis report

Static analysis result for SHA-256 c342685f482aa5b4…

MALICIOUS

PDF

57.2 KB Created: 2020-07-31 12:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d047a14e9f667a69b2dd710ae147a965 SHA-1: 2b0bf29a8b8ba05a9a77527236d4a7006129158d SHA-256: c342685f482aa5b475dc0b950110a4a4fe07b4533f2da1a298fbbe929cac0548
152 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 for a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to religious texts, likely to attract search engine traffic. The primary malicious URL identified is ttraff.ru, which is used to redirect users to other potentially harmful sites.

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=kitab+suci+agama+yahudi+pdf
    • http://files.mtbwithstacy.com/uploads/1/3/1/3/131380175/fiwir.pdf
    • http://files.minhquando.com/uploads/1/3/1/3/131398253/gifaro_kavezobolafejo_pipamev_morufofeg.pdf
    • http://files.originalgravitytours.com/uploads/1/3/1/3/131398221/puropo_sasuwaze_wanibumokif_jepasunifiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4229/files/30894698911.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/47822864269.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/vasufojijelezamujo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/49027326905.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/44235972563.pdf
    • https://cdn.shopify.com/s/files/1/0434/5449/6935/files/jazukalolilelavabu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8198/files/72495824255.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/48907257454.pdf
    • https://cdn.shopify.com/s/files/1/0434/8536/4390/files/papawexowawotudijo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/josozutitujixewelexoke.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/
    • https://cdn.shopify.com/s/files/1/0430

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a3bb.bin
2c33497f4e39d84697a8bb0b92fe5b5ec370897d5b8cdddbe9e470531a73cbd2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BB 5200 bytes
font_01_sfnt_off0000b575.bin
87cda1858c4bd1bc315d98c2ab288f38eb27d9118dbffd82bef4d500275f49ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xB575 10148 bytes