Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dcd14d918d79d29…

MALICIOUS

PDF

50.6 KB Created: 2020-08-31 02:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cba73308f36e9aa8f447beadfd673376 SHA-1: fb258459cc2ef62498dd1bf4c0f30b313713f963 SHA-256: 2dcd14d918d79d29ea9e46b4ba66eb773bee090176aebd190fdc230da1e6980d
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. The document body, though partially garbled, contains the malicious URL and references to iPad applications, likely serving as a lure.

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=vo%25C4%25BEn%25C3%25A9+kreslenie+aplik%25C3%25A1cie+pre+ipad
    • https://cdn.shopify.com/s/files/1/0462/6366/4794/files/darejutupam.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/ladup.pdf
    • https://cdn.shopify.com/s/files/1/0432/5218/7298/files/lukunemimagaxojawifitos.pdf
    • https://cdn.shopify.com/s/files/1/0452/4628/3937/files/analise_combinatoria_combinao_simples.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.pdf
    • https://cdn.shopify.com/s/files/1/0465/2957/7118/files/icinga2_api_cheatsheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8088/4129/files/action_3d_audio_songs_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/maths_sheets_for_grade_1_australia.pdf
    • https://static.usrfiles.com/ugd/99965f_e1da90d76f0d404aa88705e46edee72d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6f038eb6dce4d23bb1f7da16ae09421.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/pagutebetibak.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/xepezupemelumijegiku.pdf
    • https://cdn.shopify.com/s/files/1/0439/3920/1192/files/scratch_para_arduino.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_off000082cc.bin
a6376794a2b9e223b61102d30f8e8441986fed0c1fa3c0fe23ecadfb0e667506
pdf-font-stream PDF embedded font (sfnt) at offset 0x82CC 5532 bytes
font_01_sfnt_off000094cf.bin
8c063669c40ae0875af854385784cd7f17f045d21b3c35bb49eeccb98c994034
pdf-font-stream PDF embedded font (sfnt) at offset 0x94CF 12968 bytes