Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abd62989e97fc6e…

MALICIOUS

PDF

42.0 KB Created: 2020-08-28 01:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96d809707802fd7d2064ca176fca03f0 SHA-1: 1fecebe795090671fc75af03d0624eb3b3f2f242 SHA-256: 4abd62989e97fc6e4127d69fae1600e20a49b35f59ea00c8a3b69725c0a7ecc2
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a utility for converting images to PDFs. The document body, though heavily obfuscated, contains the URL "https://ttraff.me/pify?keyword=a-pdf+image+to+pdf+key", which is flagged as a known malicious redirector. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to benign Shopify domains but are likely used to mask the malicious intent. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.me/pify?keyword=a-pdf+image+to+pdf+key
    • http://lexedo.hardawayart.com/uploads/1/3/0/8/130873995/4668603.pdf
    • http://fofitud.walshinthecloud.com/uploads/1/3/1/3/131383483/sejusisofara.pdf
    • https://cdn.shopify.com/s/files/1/0434/6416/3490/files/groin_pain_stretches.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/punepilekevinotatof.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7637/files/cotton_eyed_joe_banjo_tab.pdf
    • https://cdn.shopify.com/s/files/1/0437/7031/4903/files/koruximub.pdf
    • https://cdn.shopify.com/s/files/1/0461/9170/6263/files/75871072124.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/muzafoxupekeguku.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/gewizija.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2775/files/jerupadosomogot.pdf
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/98220287007.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/tubipamem.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_off00006571.bin
9fab9ebfe1c0a275eaa87bcc85fb187ce2ecb5609af45e7edf6379fc36e6eb53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6571 5240 bytes
font_01_sfnt_off00007755.bin
9c992c46953cfe744906371d9a23817fbf172d875315df1005d356201fad0f77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7755 10592 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.