Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f977c5ab1e451f7…

MALICIOUS

PDF

43.1 KB Created: 2020-08-11 16:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16b981a185477c184d1ccd9d862dd6f8 SHA-1: 3892ae4533ab614cdfd898656cc022899af129d8 SHA-256: 1f977c5ab1e451f7b80462e6e36cf342b3a41e2474eb5a21174c41711dcff29a
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised as a business contract agreement. This is further supported by heuristics indicating a malicious redirector and a link farm, suggesting an attempt to lure users to malicious content. No scripts were extracted, but the embedded link and document structure strongly indicate a phishing or redirection attack.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=business+contract+agreement+sample+pdf
    • http://katus.deliverydoula.com/uploads/1/3/1/3/131383483/gazurebafel-gowujiremezogo.pdf
    • http://files.twiggardens.com/uploads/1/3/1/1/131163533/dokelutawa_bajobuxarir_fusuzet_pinuzu.pdf
    • http://fulew.leftyyang.com/uploads/1/3/1/6/131607163/872205.pdf
    • http://files.thetalentz.com/uploads/1/3/1/4/131438324/8700017.pdf
    • http://files.worklifespanish.com/uploads/1/3/1/3/131398440/2ea150a42a2.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/dotizolejirikizugafep.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/3004/files/34807052727.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/xcii_in_roman_numerals.pdf
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/33819568752.pdf
    • https://cdn.shopify.com/s/files/1/0446/7530/1539/files/bronchopneumonia_in_child.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0605/files/videnedod.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/metabolic_syndrome_articles.pdf
    • https://cdn.shopify.com/s/files/1/0446/7975/7977/files/graveyard_keeper_hops_seeds.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/jodisufoku.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/kevomipunezinukap.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7475/files/lupobupexinesoxetodoned.pdf
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/xidoxinififu.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_off00006835.bin
7ae9999f800b8e6c5b9d6462e5801b9dadac431c2b63d9dd14051a7892eeb7a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6835 5524 bytes
font_01_sfnt_off00007ae3.bin
50a2635469cabd2c90e7b5b7061241e4b6d42e213f9e143278f09fef975f4073
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE3 10536 bytes