Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08505aa3481d5ae…

MALICIOUS

PDF

42.4 KB Created: 2020-08-17 07:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5926e20a5ff739b27fef36a6bc82800f SHA-1: 62b8c6266338f485e71c081141cf7340a039084a SHA-256: d08505aa3481d5ae57c25059e3170b1edfbee0803bd0b9225d7d5aeeb68cb72a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'drill and tap chart' and includes the malicious URL. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing or malware distribution site.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=drill+and+tap+chart+mm+pdf
    • http://files.natjacobs.co.uk/uploads/1/3/0/8/130873855/a616db7c5acd.pdf
    • https://cdn.shopify.com/s/files/1/0429/5645/6095/files/97733613450.pdf
    • https://cdn.shopify.com/s/files/1/0431/0604/2023/files/vibatafisonuxifijunonav.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/al_quran_30_juz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9089/4247/files/dance_music_free_dj_mixing.pdf
    • https://cdn.shopify.com/s/files/1/0438/1910/6466/files/36570192937.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/zasukimebisekemivipirovov.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/63367923077.pdf
    • https://cdn.shopify.com/s/files/1/0431/5434/2042/files/commercial_appeal_crossword_puzzles_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/fexisafolenikagofaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/cell_cycle_cdks_and_cancer_a_changing_paradigm.pdf
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/english_speaking_exercises_intermediate.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/21262145436.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_off000067a7.bin
46a879a2376c6a01ebb32a3ec0c75c2fe5b0c2eb56dd30f3881256dc0a4eff0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A7 5216 bytes
font_01_sfnt_off00007933.bin
c7891d22b98fa1385bda5810b32881caa616e4ecab525c8697ce851aab00366b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7933 10584 bytes

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