Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e199e215712943…

MALICIOUS

PDF

42.0 KB Created: 2020-08-06 08:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf2d4e6ed93cb158c400f1e7ed8da26b SHA-1: 8c66b5257249d6d0e3c689ff0351654699fb5b04 SHA-256: b0e199e2157129430dd8d755d911a6de6c9c69c65cc8f71b65e61c44dcd0226a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes the text 'Boost your self confidence pdf' and a URL that matches the malicious redirector, suggesting a lure to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content.

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=boost+your+self+confidence+pdf
    • http://files.alexoconnor-onlineportfolio.com/uploads/1/3/1/3/131398392/kepuda_befaz_nugojuxatowofuz.pdf
    • http://files.birchleystea.co.uk/uploads/1/3/1/3/131383483/9113676.pdf
    • http://xesapi.communityactionboonewinn.org/uploads/1/3/0/7/130739826/7fde1f66c64c98.pdf
    • http://files.andersoncovehouse.com/uploads/1/3/0/7/130776401/6753078.pdf
    • http://files.martachaffee.com/uploads/1/3/0/7/130775180/4953079.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/15864396867.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/fomimijo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3699/7782/files/tiamat65renee_yahoo._com.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/80430317233.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/chuyn_dng_nh_sang_word_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/63060222111.pdf
    • https://cdn.shopify.com/s/files/1/0428/8951/1068/files/pidujap.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/zejamudefifab.pdf
    • https://cdn.shopify.com/s/files/1/0429/2447/4531/files/pemujudivepemutaje.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9295/files/toyota_corolla_verso_2020_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/3006/7865/files/91578446311.pdf
    • https://cdn.shopify.com/s/files/1/0438/4843/3829/files/addition_of_dissimilar_fractions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7498/5885/files/journal_of_sport_and_social_issues.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/
    • https://cdn.shopify.com/s/files/1/0431/7498/5885/files/journal_of_sport_and_

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006572.bin
b9aefd6a651c37fd3a2b4fa577563d51227ac065a09b6f57ce951f74328284bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6572 5092 bytes
font_01_sfnt_off000076e5.bin
c63b60c01093bb21ea84dd55e1779d2a5bd96d3d5c75da80d97d1b013cb02d8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E5 11004 bytes

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