Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafae805f15fe37e…

MALICIOUS

PDF

47.6 KB Created: 2020-08-14 21:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8f20d80e14e5d814597844fd4dbd676 SHA-1: 0dc6ddcb289a20f4be882362b3a438f8b5addf0f SHA-256: cafae805f15fe37ebc5d58551fdaee7e222dcfc677eb1981fb74c39bede296bf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body also contains a large number of links to various PDF files hosted on Shopify, suggesting a link farm or SEO poisoning attempt to increase visibility. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL points to a delivery mechanism for further malicious 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.cc/pify?keyword=vidmate+er+apps+video
    • http://files.studiocomforttx.com/uploads/1/3/1/0/131071043/3459038529b.pdf
    • http://fewesebo.moraira-holidayvillas.com/uploads/1/3/2/3/132303238/8994521.pdf
    • http://maguvepe.keyboards.es/uploads/1/3/1/1/131163635/xukawizozusor.pdf
    • https://cdn.shopify.com/s/files/1/0449/6100/5736/files/roman_catholic_telugu_bible_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6557/3537/files/33271451462.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28851780814.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8071/files/share_allotment_letter_format.pdf
    • https://cdn.shopify.com/s/files/1/0434/6236/1245/files/persona_5_how_do_you_train.pdf
    • https://cdn.shopify.com/s/files/1/0438/3490/0642/files/kavavizinejidirafarib.pdf
    • https://cdn.shopify.com/s/files/1/0433/2974/9147/files/anemia_ferropenica_y_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/zixafigomitukalefipebun.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/zififizugaxofuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/xojagifozatojaremorunolad.pdf
    • https://cdn.shopify.com/s/files/1/0430/9336/0791/files/likewukilufuvofabukifezo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/arranged_rk_lilley.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/vesapobibukodonuf.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065d7.bin
cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D7 2952 bytes
font_01_sfnt_off00007066.bin
990cc644b0b2b67a4de0a508e030b348f21682b6cb3b18d59f1ecf4ac58608c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7066 4780 bytes
font_02_sfnt_off000080a3.bin
95928f2bb705fb5d199cf89a3e078f112a435088fd3272ff1be4507eb3629757		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80A3 10112 bytes
font_03_sfnt_off0000a349.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA349 4324 bytes

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