Malicious PDF — malware analysis report

Static analysis result for SHA-256 c370022ffd679e16…

MALICIOUS

PDF

41.0 KB Created: 2020-08-11 03:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 774f1104d63cc7e3a95d84def7fb6ea0 SHA-1: d4dd5cb8a86e79153747e881915825dae9417030 SHA-256: c370022ffd679e16bf9ed23882c8d8a190583ad29c7ea3e795db1b733352102c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=employment+termination+letter+pdf, is presented as an employment termination letter, likely a lure to trick users into clicking. The file also contains a large number of links to Shopify domains, many of which are likely part of a link farm to improve search engine ranking for malicious content.

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.com/pify?keyword=employment+termination+letter+pdf
    • http://sujuduxu.flsteppersint.com/uploads/1/3/1/6/131637814/328330.pdf
    • http://files.thelovesum.com/uploads/1/3/1/0/131070192/zojilizix-xexigaxanerokel-mezaji-lapifasosesupum.pdf
    • http://files.diblife.com/uploads/1/3/1/0/131070483/gosodanopuwovuk.pdf
    • http://baker.gratitudetravels.com/uploads/1/3/2/6/132695471/9575692.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3535/files/zonowurimobuvedeweki.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/rimav.pdf
    • https://cdn.shopify.com/s/files/1/0430/5335/1066/files/nominal_ordinal_interval_ratio_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/xanetizoge.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/bukanutegekifigawigixu.pdf
    • https://cdn.shopify.com/s/files/1/0446/8133/0841/files/vineland_adaptive_behavior_scale.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4629/files/kefetapip.pdf
    • https://cdn.shopify.com/s/files/1/0429/7244/6873/files/27646612195.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/17682508989.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/jetekemaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/1310/4028/files/calculus_problems_solved.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_off000062e1.bin
47b86eefaabed26f70d82bf983e38cb303d54f14bb59eebcc594cda91a93fd60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E1 5068 bytes
font_01_sfnt_off00007411.bin
b99f296f7f11ed9ae5e6ba2f48158afdc0fe129ecb6326458307c14046e25503		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7411 10360 bytes

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