Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb00d311f6f1bc6a…

MALICIOUS

PDF

41.6 KB Created: 2020-08-02 10:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 645aae1aba9cd787ebc3521e25c617ea SHA-1: 4d110d59a8c32ca79d7ad13360cd6c4798d36667 SHA-256: fb00d311f6f1bc6ab384adc35532c3663d0987ce55887954e65000ddadd14984
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes text related to 'Rug doctor deep carpet cleaner parts diagram' and references the wkhtmltopdf tool, suggesting a lure for search engine optimization (SEO) spam or potentially malicious content delivery. The presence of numerous external PDF links further supports the SEO spam or link farm hypothesis.

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=rug+doctor+deep+carpet+cleaner+parts+diagram
    • http://files.southforkprovisions.net/uploads/1/3/0/8/130874091/9076708.pdf
    • http://files.thinkgroupindia.com/uploads/1/3/0/7/130776578/4434016.pdf
    • http://files.lincolnsmithmusic.com/uploads/1/3/1/3/131384071/rodajugukugefero.pdf
    • http://files.lumianna.fi/uploads/1/3/1/4/131437530/757f0f914f01.pdf
    • http://files.robbimae.com/uploads/1/3/2/6/132680974/361d5bacd4e3d.pdf
    • https://cdn.shopify.com/s/files/1/0429/5101/6614/files/rigamagejelolodagaziduvu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/jinirurirexovalisabosu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6925/files/kurupofilusibapafeza.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/naxuwibigo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6746/4093/files/bozadaluzekekirufuvuzalon.pdf
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/46487246830.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6071/files/5311025481.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/zewefapoferamixuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/40776683659.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/rust_key_binds.pdf
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/intermediate_accounting_19th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/dugeguvodejowajuze.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_off0000641c.bin
588bb5469f33324be11a1dde3da554458d0903f245b9d6140b880e03832304b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x641C 5400 bytes
font_01_sfnt_off0000766c.bin
520e3aa0af8ed0fb296c487a013310087d6eb12981f19f254dffef21de16eba7
pdf-font-stream PDF embedded font (sfnt) at offset 0x766C 10276 bytes