Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d2fbed66660661…

MALICIOUS

PDF

57.3 KB Created: 2020-08-22 07:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc700f9453574b6198337f65ac35f089 SHA-1: 46e630f8a6b62fc91fe89b07adc2410243e28f6e SHA-256: 88d2fbed666606617791db0e11a7b152e9cafde8945e6f0bd04cbe4759e2308d
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=english+calypso+songs+free'. The document body, though partially corrupted, also contains this URL and other Shopify links, suggesting a lure to a malicious site. The ML classifier strongly supports the malicious nature of this PDF. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful content.

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.ru/pify?keyword=english+calypso+songs+free
    • http://files.spacesrp.com/uploads/1/3/2/8/132814071/tokazifup.pdf
    • http://toboxaloj.northportcarpet.com/uploads/1/3/1/4/131410812/semigukaw.pdf
    • http://files.allstudentslearn.com/uploads/1/3/0/8/130874403/f5e53b0d7.pdf
    • http://files.jackielhutchings.com/uploads/1/3/0/7/130775156/62fa17d3f57a.pdf
    • http://files.katongfamilyclinic.com/uploads/1/3/1/4/131413678/nagonodifezefosit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21883700101.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1702/files/creeper_farm_bedrock.pdf
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/69372621182.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/computer_hardware_and_networking_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/video_player_hd_pc.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/3509043254.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/4006/files/66451627496.pdf
    • https://cdn.shopify.com/s/files/1/0437/8286/5047/files/tifur.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/28739412710.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/machine_learning_by_andrew_ng.pdf
    • https://cdn.shopify.com/s/files/1/0437/9105/7058/files/bigivigajo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7614/0710/files/general_discord_rules.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/automate_the_boring_stuff_using_python.pdf
    • https://cdn.shopify.com/s/files/1/0434/6180/4198/files/wuzizipuzadipoxixomev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000095c8.bin
7378b87b82b1bd6522acb801de577489484274e5d3639af0c8d93397f6be523a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95C8 5044 bytes
font_01_sfnt_off0000a6e6.bin
b7247b162b2364a4f0fd1d79ce54d179f9592988bf9f0fec92436fc9bf43d6b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6E6 10188 bytes
font_02_sfnt_off0000c9e8.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E8 4324 bytes

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