Malicious PDF — malware analysis report

Static analysis result for SHA-256 06580876568f13ef…

MALICIOUS

PDF

46.1 KB Created: 2020-08-15 21:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d15796577904fe2d1c58687e00b9a87 SHA-1: b929de1aea03a9b802b1c32382ae5b008b22d334 SHA-256: 06580876568f13ef3dee25f6ac6b3b589408f17d2c9437bd31eb41dfdf4a1bca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'online hd pdf converter' and a URL that aligns with the malicious redirector heuristic. The ML classifier also strongly indicated maliciousness. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for phishing or further malware delivery.

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/wb?keyword=online%20hd%20pdf%20converter
    • http://zixivem.ashlieelizabethphotography.com/uploads/1/3/1/6/131606027/gevajut.pdf
    • http://files.sanmateolimos.com/uploads/1/3/1/3/131383553/612544a.pdf
    • http://fopus.boynecityhardware.com/uploads/1/3/0/7/130776485/goxavoteribeguwonum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7147/9709/files/fefibawitobuniwilenaki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/31596092860.pdf
    • https://cdn.shopify.com/s/files/1/0434/5102/3526/files/nesarevozafigi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/59098067606.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/22150176821.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/sepasukixubijaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovonuvebapade.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/boston_massacre_trial.pdf
    • https://cdn.shopify.com/s/files/1/0449/4861/9419/files/lithium_iron_phosphate_batteries.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/lopovepogujizozerebobug.pdf
    • https://cdn.shopify.com/s/files/1/0436/5749/4686/files/centrifugal_compressor_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/6145/1681/files/arguing_about_literature_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/3395/9327/files/o_meio_ambiente_em_debate.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068b0.bin
47a1745369f9d8e906fbf9be1dcc6d85493baa976bbdf393d86dad16f72da1c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B0 4732 bytes
font_01_sfnt_off000078bd.bin
bbded1c2edaeefd4fe948acffeb9507b1f2de108616e1187309d7f838b61ed41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BD 11276 bytes
font_02_sfnt_off00009da9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA9 4324 bytes

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