Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ead2a307124b3d…

MALICIOUS

PDF

42.3 KB Created: 2020-08-23 18:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cca2acd2b3f8ae0f889c42ce8d9125b2 SHA-1: c3dd5f96c585bbd7f67550236b2602b0de2f6ddc SHA-256: d7ead2a307124b3d1cedc1693517895a19d75e114d9c902fd5f00ae4165ce7c8
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=authentic+performance+assessment+examples' which is likely used to redirect users to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or a method to distribute malicious content.

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=authentic+performance+assessment+examples
    • http://wiweveno.hbnaz.org/uploads/1/3/0/8/130814328/2400221.pdf
    • http://files.planswpa.com/uploads/1/3/1/4/131453247/9496873.pdf
    • http://files.coxautoroadtrip.org/uploads/1/3/0/7/130739238/pisotusomudito_lafoterevexoni_gojipe_titakubusimiz.pdf
    • http://wezoberoz.pureexistencedance.com/uploads/1/3/0/7/130739892/4077893.pdf
    • https://cdn.shopify.com/s/files/1/0434/5217/0392/files/3924511329.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7074967355.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xoxolesusoziviro.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/tchibo_cafissimo_latte_bedienungsanleitung.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/imash_music_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/peloxozur.pdf
    • https://cdn.shopify.com/s/files/1/0436/6260/6489/files/33112638866.pdf
    • https://cdn.shopify.com/s/files/1/0441/2129/2952/files/molecular_biology_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9384/files/36050484291.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/ludora.pdf
    • https://cdn.shopify.com/s/files/1/0431/9192/6948/files/vulif.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/pdf_blank_utility_bill_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/88236979196.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000684e.bin
a29496816823b5c960230503011cb47a0723b329414d076072c9bf926a0f7553		 pdf-font-stream PDF embedded font (sfnt) at offset 0x684E 5312 bytes
font_01_sfnt_off00007a2d.bin
3a76b1a13d5d989df9e5ed42cd48d4cbc50eaf71f81793f037972e2abbec75ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2D 9932 bytes

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