Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f7c6563da5bd37e…

MALICIOUS

PDF

44.6 KB Created: 2020-08-29 13:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c70ae10ce88767c4aa186c6d743d363e SHA-1: f38120f9ec804c985e7e6330932e34ef0383dad3 SHA-256: 6f7c6563da5bd37e3b59820f8e0e8968106535e35a1e47fe37f4dffd6bcc6e00
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text suggesting a lure for "new bengali movies" and includes a URL pointing to a malicious redirector. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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.cc/wix?keyword=new+bengali+movies++link
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/already_yet_still_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/kemurufozoxawegumipasufu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4340/files/apartment_lease_application.pdf
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/lozizikedopolupemelosikig.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/subav.pdf
    • https://cdn.shopify.com/s/files/1/0435/5522/5763/files/zodajerepisagubo.pdf
    • https://static.usrfiles.com/ugd/b8c837_f577c71b25d34336a75ae439f6210a03.pdf
    • https://static.usrfiles.com/ugd/89064d_d6fb6675db82451a98ae05d10cd57776.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf663ef75b884e2ba445f1a2d681b5c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b134deba61ea41e5b8d411481a5f561c.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d228cf0fb074174a5a836a7df557179.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ff0917d947c45d19f3b22cda3ddc578.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/
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055b9.bin
db0a489a1aa5cbd0cbea2921d8591e6c5ec540d680f44293523041a36784fbd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x55B9 5232 bytes
font_01_sfnt_off00006799.bin
2c25eb2be2e2bee1840821d4a700249f8d0b3043d6ce099d423c131869700eba
pdf-font-stream PDF embedded font (sfnt) at offset 0x6799 8648 bytes
font_02_sfnt_off00008364.bin
bb8026348f1b955e2899aa91ff9d49637717ac71e9e282834c963701d990ea71
pdf-font-stream PDF embedded font (sfnt) at offset 0x8364 9956 bytes