Malicious PDF — malware analysis report

Static analysis result for SHA-256 d080d4d425dd2543…

MALICIOUS

PDF

33.9 KB Created: 2020-08-21 20:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddea91da6194dac11e80e2a4688a8dba SHA-1: 66d85d63bd12f848d763ad2599392ead89ddc6ad SHA-256: d080d4d425dd25430498510ec2fa8a6f1aa48c5b0c3756270d486ac335667cfd
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. Additionally, it exhibits a PDF link farm pattern, with many embedded URLs pointing to external PDF files, some of which are hosted on Shopify. The primary malicious URL identified is https://ttraff.com/pify?keyword=bhojpuri+film+comedy+video, which is likely used to redirect users to further malicious content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=bhojpuri+film+comedy+video
    • http://sijotexun.graceforthebroken.org/uploads/1/3/2/6/132695780/vexemawepogu.pdf
    • http://zobeto.buffalomiksang.org/uploads/1/3/2/3/132303382/7379211.pdf
    • http://pelased.profi-solar.com/uploads/1/3/1/6/131637257/nuronoxuxuza_fevisudodizid_dolunoxoxego.pdf
    • http://files.lomavistamemorialpark.com/uploads/1/3/1/4/131482950/kobewafan.pdf
    • http://files.aunaturalqueen.com/uploads/1/3/1/4/131437119/livejakirozu_petejawuvob_jegologuba_xajunuvem.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/kamaiyan_aslam_ali_video_song_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1688/files/nizebitofitazuxibato.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/bojof.pdf
    • https://cdn.shopify.com/s/files/1/0438/1114/3842/files/zanitupojitosomo.pdf
    • https://cdn.shopify.com/s/files/1/0440/9327/6312/files/17012948927.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/5496531918.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kumug.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/sublime_text_2_serial.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/galesurekurikeloxifidaxib.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_off000048f7.bin
da0af4f2fdc74f6434bad5f4dffe0f44ba5a9059f48d98fcebf287ae3cd92668
pdf-font-stream PDF embedded font (sfnt) at offset 0x48F7 5292 bytes
font_01_sfnt_off00005aec.bin
9d4aa5a3d1463a5a466fb46d266bde1a4dff9eb1fba47550a1ade6a7e46a18b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEC 9392 bytes