Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce8f2556ccce124…

MALICIOUS

PDF

44.7 KB Created: 2020-08-17 13:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8407fbcf14d4a33ba568b91b3eaaaa5 SHA-1: 062249c7b297e516ae3eee7d89e1b66f56ccdfe4 SHA-256: 6ce8f2556ccce1244b8f8c726aeea3ef9bea49f62e2a4349a0c0ab876b2eab54
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, mentions 'Filmora templates intro' and includes a URL pointing to a redirector, suggesting a lure to download potentially 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.cc/pify?keyword=filmora+templates+intro
    • http://mitaj.yawenyang.com/uploads/1/3/2/6/132682347/1daca158b267aa1.pdf
    • http://files.pricevillefire.com/uploads/1/3/2/6/132695932/bde8b87b16f0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/73551679072.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/54987467490.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/42222987340.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/66990306353.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/business_english_course.pdf
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/importance_of_ecotourism.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0728/files/ripewimumexamotaban.pdf
    • https://cdn.shopify.com/s/files/1/0428/0811/5366/files/momabuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/5570/2425/files/zupofufowobezamore.pdf
    • https://cdn.shopify.com/s/files/1/0446/9604/3674/files/iridescent_pearl_vanilla_wow.pdf
    • https://cdn.shopify.com/s/files/1/0430/8867/4967/files/debuzipu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/chinna_chinna_solleduthu_video_song.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c97.bin
084faddfb537a49d6755c1eb0d25fccd74b2b5db5a1b41df8777ae905bb168fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C97 4920 bytes
font_01_sfnt_off00006d34.bin
82e04913f98ca0ab287de4151f167c8ef873dfe3927fe4a857fa20b9208c5055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D34 10412 bytes
font_02_sfnt_off0000910f.bin
9fce2e558c7eba93e9b4ba87b790c422cf9490aab73fe875614431ac3e7f116a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x910F 16060 bytes

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