Malicious PDF — malware analysis report

Static analysis result for SHA-256 f070689398ec67ad…

MALICIOUS

PDF

53.7 KB Created: 2020-08-02 14:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07f15c15298aa6d203d2dd2771c65561 SHA-1: c322fead93112ef80c7c882b98cf4de8be410818 SHA-256: f070689398ec67add492e8292cda97e3d3b6921c2b1638ae5dda7d05a6e58038
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=charlotte%25E2%2580%2599+s+web+e.+b.+white+pdf'. This URL is likely part of a phishing or scam campaign, attempting to lure users with the 'Charlotte's Web' theme. The document also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

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=charlotte%25E2%2580%2599+s+web+e.+b.+white+pdf
    • http://files.stjohnlutheranchurch.com/uploads/1/3/1/4/131454034/9002567.pdf
    • http://files.pft-alexandernews.com/uploads/1/3/0/7/130739974/pewetige.pdf
    • http://files.flexgangent.com/uploads/1/3/2/6/132681617/mejokaxexidu-mekuwugu-gexasonevefevup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/865315225.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/joxola.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/javascript_decimal_to_hex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/45995186897.pdf
    • https://cdn.shopify.com/s/files/1/0428/8879/0179/files/76842052864.pdf
    • https://cdn.shopify.com/s/files/1/0429/3374/7878/files/64083392750.pdf
    • https://cdn.shopify.com/s/files/1/0437/6782/4533/files/47892875151.pdf
    • https://cdn.shopify.com/s/files/1/0434/1438/8892/files/zawubobavevejirebe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/noronutifamaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/0805/5720/files/itoa_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0437/3381/1351/files/peboxawiwokolutanar.pdf
    • https://cdn.shopify.com/s/files/1/0431/9939/8052/files/sixiresepunazomigo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/29574696016.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_off000091e8.bin
18dc208a5f93e381228aea8f05a94f5a2e871457ce3fc47b53870084f579592b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91E8 5348 bytes
font_01_sfnt_off0000a422.bin
494b344632d765b83d1db9bccad4d3df3e4eec21d31db8c83f53ba0b24cf05db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA422 10340 bytes

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