Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd7e1470b604749…

MALICIOUS

PDF

43.2 KB Created: 2020-09-05 14:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20cb6777f03aa8a2787d0a5065ede265 SHA-1: 7f18215ac37a33810a3ebe6fcc34485fe0391009 SHA-256: 3fd7e1470b604749021fb4417cfcb7b2e285129831ec7e0c42ea88537d7956cd
154 Risk Score

Malware Insights

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

The PDF document contains embedded links, one of which is identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is an 'etdp seta bursary application form 2019 pdf', which serves as a lure. The presence of numerous external PDF links, many hosted on static.usrfiles.com, indicates a link farm strategy, likely to improve search engine ranking and distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.link/wix?keyword=etdp+seta+bursary+application+form+2019+pdf
    • https://static.usrfiles.com/ugd/41f880_29d842422f314afdbb7682594cde0ade.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_a53066328df14c43b669959dd49665e4.pdf
    • https://static.usrfiles.com/ugd/5be868_9e36dd8abbb14951b1c0adc22813b2dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_65a89d287a984481afab65a9a83a6242.pdf
    • https://static.usrfiles.com/ugd/cf14a4_ee3f47782e514be593c4c3347abdacd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c60d65537eb74b61a35721d0745921d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_0059d019dd9447f2a0ece78b553d13f6.pdf
    • https://static.usrfiles.com/ugd/b98abb_197662545e4341fa8ffcb5fca5360d99.pdf
    • https://cdn.shopify.com/s/files/1/0461/7905/7817/files/all_black_wallpaper_hd.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/pregnancy_related_pelvic_girdle_pain_csp.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5188/files/73285474284.pdf
    • https://cdn.shopify.com/s/files/1/0456/5270/5447/files/angioedema_hereditario_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/6626/9600/files/bkash_agent_app_link.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/download_eminem_song.pdf
    • https://cdn.shopify.com/s/files/1/0428/8842/9724/files/babylon_mystery_religion.pdf
    • https://cdn.shopify.com/s/files/1/0435/1167/7083/files/cecelia_ahern_where_rainbows_end_free_download.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_off0000673c.bin
0ddde4b0c0a6feb50aa2be224787a120b6b7b92fc6cb1a4989ab9a99d852cc3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673C 5980 bytes
font_01_sfnt_off00007b8a.bin
71278a2cf38fedf835fc2e4705f50632251e68e2e67c9498fba30058be1418ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B8A 10704 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.