Malicious PDF — malware analysis report

Static analysis result for SHA-256 03828cbbd8e40f57…

MALICIOUS

PDF

51.9 KB Created: 2020-08-31 12:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9e3fe231955085fa6c74e487caa1504 SHA-1: b6a7b005647b2d06d39d43d568693f00573eec28 SHA-256: 03828cbbd8e40f572c6ea619baaaa6a465c8349ed5a8a2eacac27f88aa905b95
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to 'clickteam fusion tutorials' and a URL pointing to a potentially malicious redirector. The presence of numerous links to PDF files hosted on Shopify, combined with the malicious redirector, strongly indicates an attempt to engage the user in a scam, likely an advance-fee fraud as suggested by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wix?keyword=clickteam+fusion+tutorials
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/cara_video_di_proxy_browser_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/3971/8562/files/17_hp_kawasaki_engine_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/91062963872.pdf
    • https://static.usrfiles.com/ugd/a18aa6_5975c56a532b45cf96e7e8c51b3793ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_283632828de34f7f9abc0ffae2dd97ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_538721c2a6c542a3807f4fcdeba1b002.pdf
    • https://cdn.shopify.com/s/files/1/0430/7750/1095/files/gutodakodus.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/movijetowefetepulopasij.pdf
    • https://cdn.shopify.com/s/files/1/0462/4400/3989/files/potalupovuximuminaxobun.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/13619832270.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/dowinol.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7123/files/boylestad_electronica_analogica.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/83088640748.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_off00007f9c.bin
fbba14ed4ccbda8a6901c7a6d360772b81555bfc8f75dabe891e764de8eb8fc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9C 4996 bytes
font_01_sfnt_off0000907d.bin
1d72a7ebec49981fe965ba558cc352e68c4f77c1c2460b500472e2007c05d5fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907D 10664 bytes
font_02_sfnt_off0000b42f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB42F 4324 bytes

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