Malicious PDF — malware analysis report

Static analysis result for SHA-256 4720b525bd6d9413…

MALICIOUS

PDF

45.6 KB Created: 2020-08-12 12:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8f6a5efe5c21f7ad0d8b970f8453c9a SHA-1: a51c04b3a7a6b666410093bf8357b6ef41044119 SHA-256: 4720b525bd6d9413c93b349ebd16d2fdd1002816c7901e90f37c18d7b1365f65
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious sites. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to Shopify domains. The primary malicious link is https://ttraff.com/pify?keyword=life+in+the+fast+lane+ecg+pdf, which is likely used for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent.

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.com/pify?keyword=life+in+the+fast+lane+ecg+pdf
    • http://files.bubbasdeli.com/uploads/1/3/0/7/130775846/9875945.pdf
    • http://files.julieannejonmichael.com/uploads/1/3/1/8/131856170/tevikasumuvedir.pdf
    • http://files.tacomasbestpiercing.com/uploads/1/3/0/7/130776483/kelitozilu_xamupu_xagazipepavoji_rebefodoxapiwe.pdf
    • http://files.pmsmachinery.us/uploads/1/3/1/3/131382274/5d0d1e.pdf
    • http://seseti.fwbhs-band.com/uploads/1/3/2/8/132814930/lesesezag_devefovizose_mabid_kelozu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/cpt_manual_professional_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/33489692498.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/82130653734.pdf
    • https://cdn.shopify.com/s/files/1/0434/4437/1613/files/zonanogopamovepuve.pdf
    • https://cdn.shopify.com/s/files/1/0430/2517/0595/files/fitawatademutex.pdf
    • https://cdn.shopify.com/s/files/1/0435/7190/4673/files/koramera.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3871/files/25614900053.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/flawed_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/6218/8449/files/bodor_dm_sinistra_krzet.pdf
    • https://cdn.shopify.com/s/files/1/0434/2608/7064/files/77548389787.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2306/files/11588559924.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/fijof.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/67350065387.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1935/files/76162743640.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_off000072a1.bin
6cc92a5bf5e612974d3c5bd3d43b6e2121c220ff9f3ae4068cdb028b90d20b8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A1 5260 bytes
font_01_sfnt_off00008482.bin
836a717ddc725470929103c13dc8737ea616a0f38df9ec1ea29c2bf4586ee53c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8482 10932 bytes

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