Malicious PDF — malware analysis report

Static analysis result for SHA-256 23dd1a7042953ad2…

MALICIOUS

PDF

53.0 KB Created: 2020-08-07 16:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 359cb900d08b8e8bf06b65939e3d50ed SHA-1: 074a572c90b4175b062e6c14113473bb6da5d79b SHA-256: 23dd1a7042953ad209c3d41541600341ac4e157a5bb71f7ce2760516a9f07a8e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to appear as a price list, but the primary link redirects to malicious infrastructure. The ML classifier strongly indicated maliciousness. The document body contains obfuscated text and URLs, including a redirector link to 'ttraff.cc' which is flagged as malicious. This suggests the document's purpose is to lure users into clicking malicious links.

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.cc/pify?keyword=ahuja+sound+system+price+list+pdf
    • http://files.montclairathletics.net/uploads/1/3/1/3/131380717/zewadabedex-fojegojunozatif-lasavile.pdf
    • http://files.mysticsilverglass.com/uploads/1/3/0/7/130740193/rasomotonibi.pdf
    • http://files.doctorsinrecital.org/uploads/1/3/1/0/131069766/setimazuwosodilumo.pdf
    • http://files.holistichealingandbeing.com/uploads/1/3/0/7/130775612/munobapo.pdf
    • http://files.brianstrumwasser.com/uploads/1/3/2/7/132740375/gaxodozewewomefol.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/406906188.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81236671698.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/24375498268.pdf
    • https://cdn.shopify.com/s/files/1/0435/4002/1407/files/podelexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3177/2835/files/najezozipifesuwe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8440/7199/files/brushless_alternator_seminar.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/jubirelafikakuzaripejo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/garawetuwugogexujo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/anarchism_emma_goldman.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/7972186393.pdf
    • https://cdn.shopify.com/s/files/1/0434/5010/6018/files/50565342344.pdf
    • https://cdn.shopify.com/s/files/1/0438/4253/5581/files/wewikogafopopuwefisa.pdf
    • https://cdn.shopify.com/s/files/1/0437/9512/0289/files/valewurixisedawig.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_off000070ff.bin
13f6e22b71fb68c02ff19120738dde5a58622fc4e405b932e043e9fdc00d4215		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FF 5564 bytes
font_01_sfnt_off000083d0.bin
2b6170ff8ca67a76d00900a684ce7855167d781f53ae9db07c993d8ab45a0a69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D0 14776 bytes
font_02_sfnt_off0000b181.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB181 16164 bytes

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