Malicious PDF — malware analysis report

Static analysis result for SHA-256 82bf46da9adcde21…

MALICIOUS

PDF

45.6 KB Created: 2020-08-17 04:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 058c5432cbff6deaebdd4ed5707c06db SHA-1: 213814e15833705ab68c563ddb3d389096a923ff SHA-256: 82bf46da9adcde219c7b1f10c152ac975275acd9948c9ae1acd884df8143bfab
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious due to containing a link farm with numerous external links. One of these links, 'https://ttraff.ru/pify?keyword=template+for+index+cards+5x8', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains this URL, suggesting the primary attack pattern is to lure users into clicking malicious links. No scripts were extracted from this sample.

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.ru/pify?keyword=template+for+index+cards+5x8
    • http://files.rsvpvolunteercaregivers.org/uploads/1/3/2/6/132681824/navate.pdf
    • http://vutolarok.thelashqueenofregina.com/uploads/1/3/2/7/132740214/006ea77d03.pdf
    • http://files.atthehealersnook.com/uploads/1/3/1/0/131070911/batiwa-retotuju-dafinimuz-guxexivebetik.pdf
    • http://wuguvivod.redriverministries.com/uploads/1/3/1/6/131606490/puxigim-zafisuketoretur-diredaf-soluk.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1965/files/opera_search_engines.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6976/files/pasetulusavafi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/21620334802.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84005007378.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/rebuvumeturom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0615/6190/files/daruwevuxefolimizegis.pdf
    • https://cdn.shopify.com/s/files/1/0450/9233/9877/files/22198205771.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9590150980.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/rukefunamavadaluvabe.pdf
    • https://cdn.shopify.com/s/files/1/0447/8484/4949/files/xejekaxobo.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_off000066d6.bin
c0148b50485d7dacc8a7130d61361651396982ccd7bc5aa1c4ae0daeabfcdad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D6 5424 bytes
font_01_sfnt_off0000792d.bin
a0e3ce98c9f2205767c8a7fa94b56147c06bb912d0d75b0ca1cff06d2aa535f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792D 9904 bytes
font_02_sfnt_off00009b1e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1E 4324 bytes

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