Malicious PDF — malware analysis report

Static analysis result for SHA-256 52babf83811db665…

MALICIOUS

PDF

38.9 KB Created: 2020-07-31 17:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09e834f6af6ae994b296a98c9300b2b8 SHA-1: add7935a5dbcdbb8f4b987b63bb7e2c754a7c17a SHA-256: 52babf83811db6657d464a10ecb69d43e157ab832f8e91c4db635f75bed2a21c
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 product advertisements, specifically mentioning 'Sony xplode car stereos'. The primary link, https://ttraff.ru/pify?keyword=sony+xplode+car+stereos, redirects to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links further supports a malicious intent, likely for SEO poisoning or redirecting users to malicious sites.

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/pify?keyword=sony+xplode+car+stereos
    • http://files.suzannegrantham.com/uploads/1/3/2/7/132711983/zafakotu.pdf
    • http://files.achildsworldtherapy.com/uploads/1/3/1/6/131637308/bekemupezotisel.pdf
    • http://files.rachelbeckles.com/uploads/1/3/0/7/130775633/gupomiz-xepuzanefewowu-sipowibadaf-figuzo.pdf
    • http://files.businessprocessassurance.com/uploads/1/3/2/7/132740424/d9827.pdf
    • http://files.markossotiriou.com/uploads/1/3/2/3/132303359/fevupav.pdf
    • https://cdn.shopify.com/s/files/1/0431/0443/6390/files/pedapudufefedalanifad.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/80179542101.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/mivininagufubesoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8036/files/12885548648.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/lafupigejagaxatagotukaso.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/dapegipotatobomixakiwolu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1541/2632/files/fesid.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9512/files/99933466658.pdf
    • https://cdn.shopify.com/s/files/1/0437/9338/3585/files/58210972413.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/jamewovibamidumoro.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6066/files/rinolej.pdf
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/49863135032.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_off00005a74.bin
7387fd1ea205100e8ac82c9146ca8fc8208d49861d4acc3384b625d139e4daea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A74 5340 bytes
font_01_sfnt_off00006cb9.bin
b70ad367214a3432ae9d17b120e1f5df086c352467b25edf70065412637be70b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB9 9912 bytes

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