Malicious PDF — malware analysis report

Static analysis result for SHA-256 303e480fd54d5a05…

MALICIOUS

PDF

48.1 KB Created: 2020-08-04 13:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f2866da2bb4c6814d5301c15ddb7658 SHA-1: 307924702edfbbc643ce7d4c5824b8432831fe02 SHA-256: 303e480fd54d5a0574f49d54024a65e3d7eb7356ef8ae95ac2ede00232b468bf
152 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for linking to known malicious redirector infrastructure via the URL https://ttraff.com/pify?keyword=caged+system+explained+pdf. Additionally, it exhibits a PDF link farm with numerous external links, many hosted on shopify.com, suggesting a potential SEO spam or traffic-driving campaign. The ML classifier also strongly indicated maliciousness.

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=caged+system+explained+pdf
    • http://files.gokiting.com.au/uploads/1/3/1/4/131453350/ropizolanefijuz.pdf
    • http://files.jorgemendozas.com/uploads/1/3/2/7/132712129/c7d907.pdf
    • http://files.braverthanthewaves.com/uploads/1/3/1/4/131453807/5359755.pdf
    • http://files.katshelter.com/uploads/1/3/1/4/131407469/8872337.pdf
    • http://files.emmabattenauthor.com/uploads/1/3/0/7/130776104/binedarigevije-lusulanizusew.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/72276159280.pdf
    • https://cdn.shopify.com/s/files/1/0432/0981/8272/files/35006790625.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/62876715241.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/73209628005.pdf
    • https://cdn.shopify.com/s/files/1/0433/4783/7083/files/dososopinag.pdf
    • https://cdn.shopify.com/s/files/1/0436/9675/0742/files/16753623837.pdf
    • https://cdn.shopify.com/s/files/1/0432/1515/9458/files/tejevoviwepoxumi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/altered_traits_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0434/4178/2950/files/notilazikabasovemekexujo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4887/6702/files/974973739.pdf
    • https://cdn.shopify.com/s/files/1/0432/1083/4077/files/asap_rocky_long_live_asap.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/gasejikirunediwejikuva.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_off00006957.bin
4f1758842795b132ace91c3c78cd323550c31485edcb6ad2c77d023a9903cf71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6957 5340 bytes
font_01_sfnt_off00007b85.bin
506fc716a3740191e3a5b9e9c84a5f65fee696eeb532c4ad8d54496620e3fc07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B85 10228 bytes
font_02_sfnt_off00009e86.bin
46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E86 16120 bytes

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