Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a9eb93942ca546…

MALICIOUS

PDF

53.7 KB Created: 2020-08-17 04:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83d53fc636dac78e708bf3028918d8ff SHA-1: 742a38f00df6f54e234f28f3e64454ede3225ad1 SHA-256: d4a9eb93942ca546541af747bb8f1bb3a43f89f928f764633cd97d02ec3221d7
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many hosted on Shopify, designed to appear as a link farm. One of the primary links, https://ttraff.com/pify?keyword=english+dictionary+in+marathi, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and appears to be a lure for users seeking an English dictionary in Marathi. The presence of numerous PDF links suggests an attempt to manipulate search engine results or distribute further 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=english+dictionary+in+marathi
    • http://files.alisoncowan.co.uk/uploads/1/3/1/3/131384436/69594f4638d696e.pdf
    • http://files.3civ.org/uploads/1/3/1/8/131856133/8151276.pdf
    • https://cdn.shopify.com/s/files/1/0436/5592/1817/files/xafuronum.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/34329948914.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/dowowabivumaxowutagadalak.pdf
    • https://cdn.shopify.com/s/files/1/0435/6685/8408/files/mezupaxaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6896/5532/files/tunewuxarofefovu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6021/3398/files/17338606404.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9946/files/da_form_268.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7475/files/nijixuzajalezanotozaxod.pdf
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/3996999410.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4142/files/advanced_player_s_guide_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/fesuvunuvowasagaketu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1411/0880/files/febrile_seizures_plus.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2338/files/6377790649.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_off00006e61.bin
42f3210c1e63530e33274e5a4f1bd3740be41a5b4f35d428b6226312adf84de4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E61 5412 bytes
font_01_sfnt_off0000809f.bin
a2ac8178a02b2a7937534aa1eb33e41ca75949a962a0995709543b97cafbe1de
pdf-font-stream PDF embedded font (sfnt) at offset 0x809F 11712 bytes
font_02_sfnt_off0000a6e5.bin
fab3c98bb57e7ac0cca0c1b69d7f93b762acd228b6a8b7ee4d908bca0a7c6d45
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6E5 10864 bytes