Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcc55f5adf0592d…

MALICIOUS

PDF

57.4 KB Created: 2020-08-01 13:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a118f89b58a2dd742e584474d216585 SHA-1: e5ab96a229cdc670743285aa8f12d12a84b11b8a SHA-256: 9bcc55f5adf0592d8bad61805ff91736abc8e08338d030b3f200b46d3f37284e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=phantom+forces+gui'. Additionally, it exhibits a PDF link farm heuristic, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users through these links, likely to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=phantom+forces+gui
    • http://files.montevistalacrosse.com/uploads/1/3/2/6/132681315/jamedam_wafefe_mazep_navefuvub.pdf
    • http://files.blacksheep-kitchen.net/uploads/1/3/1/3/131384542/8019278.pdf
    • http://files.twisted4kstudios.com/uploads/1/3/2/3/132303312/f7e4482b366.pdf
    • http://files.inspiredbydreams.org/uploads/1/3/1/4/131406935/2590290.pdf
    • https://cdn.shopify.com/s/files/1/0435/1236/5211/files/49881797115.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/fowoxamivik.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0306/files/duradimoxosivasafenewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/xirelekasumuj.pdf
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/93869823394.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1095/files/getawalefubavaje.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/60295022938.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/mufigenopuwemeva.pdf
    • https://cdn.shopify.com/s/files/1/0437/7837/5829/files/28895816266.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4630/files/pojedixipeguwaliladevop.pdf
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/piwokivap.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000567c.bin
51ab6905290750564d90708e7631dedb146f5386d6918388d3b3373a2b20f6d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x567C 6476 bytes
font_01_sfnt_off00006682.bin
02659c67752a9539d2bda73299a97b4609fda375b6a9275e03aca390cfa7ebb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6682 5264 bytes
font_02_sfnt_off00007805.bin
4b6e1c27fd0c617940ee0a52f8babeba8d0b9b345a8ef7ba432eea680e9963bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7805 6484 bytes
font_03_sfnt_off000087fe.bin
d05ba184de339aff85e753ee1f147b0d8c274d40bf8f15c1f80595e02369e141		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87FE 2464 bytes
font_04_sfnt_off00009306.bin
df0536f77e3f27ab9ebb5299f1921d66b2f83cd77d7aae4e49fb4f23296cd037		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9306 13684 bytes
font_05_sfnt_off0000be4b.bin
f1365651c8938a4f28398b247486b4a532d6554c6d3587b077554b386454cc9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4B 17180 bytes

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