Malicious PDF — malware analysis report

Static analysis result for SHA-256 68416d25e2f43fff…

MALICIOUS

PDF

42.5 KB Created: 2020-08-21 15:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f26fc9b8182d426dce6321c80f5bcda SHA-1: b56e9da8e422889f6fc44a6df75a7725382471d0 SHA-256: 68416d25e2f43fff0e5bfcdab92ec3f803ec0ee58d3e03bcae6728a4739f49cf
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector leading to a game mod download lure. The document body and heuristics indicate a link farm strategy, directing users to numerous other PDFs, likely for SEO manipulation or further malicious redirection. No scripts were extracted, but the presence of malicious links and the link farm strategy strongly suggest a phishing or redirection attack.

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=championship+manager+17+mod+apk+latest+version
    • http://files.shannonhardie.com/uploads/1/3/2/6/132681508/41c2a22b6d4c4.pdf
    • http://files.firstwavecharters.com/uploads/1/3/0/7/130739480/venusivelemawix.pdf
    • http://fikarori.tigerseyecreations.com/uploads/1/3/1/3/131382486/7317133.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2389/1621/files/atresia_biliar_fisiopatologia.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2536/files/atul_prakashan_books_for_civil_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/picadura_de_araa_en_nios.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2455/files/17604701702.pdf
    • https://cdn.shopify.com/s/files/1/0432/4478/1735/files/factorization_worksheet_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/decimals_on_number_line_worksheet_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0437/1415/0553/files/7732287313.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5501/files/ableton_live_9_standard.pdf
    • https://cdn.shopify.com/s/files/1/0432/9570/3195/files/arangetra_velai_movie_hd_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0434/2284/3036/files/belajar_bahasa_arab.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/serge_lang_basic_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0449/4170/5384/files/synonyms_word_list.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064fd.bin
21a0d6f0b32d9467a78427b52d6018b480a02295c747ba37a13c41822cb689e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64FD 5536 bytes
font_01_sfnt_off000077b9.bin
abe365cf64bb4df68a3adea1e29157e9cf921d2f737f2f79b399e381d3c2d646		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B9 10792 bytes

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