Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1b50217b15be48…

MALICIOUS

PDF

37.5 KB Created: 2020-08-25 03:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1360b4dc01f207fd925c0dfb8ff9bf39 SHA-1: 87419807be2b00b1981824ae903e2b9ad70fdc28 SHA-256: 7e1b50217b15be48bba3a1b6e8a75eb1985c4ca20d9ddfaa140bc07556f43616
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.com/pify?keyword=terraform+hcl+language' is a clear indicator of a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to lure the user to a malicious site.

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=terraform+hcl+language
    • http://files.playsetservices.com/uploads/1/3/1/3/131397987/2937539.pdf
    • http://files.lissawozniakphotography.com/uploads/1/3/1/3/131384383/xutik.pdf
    • http://puvejuw.sevenseasonsfarm.com/uploads/1/3/2/7/132712348/82e01ad5.pdf
    • https://cdn.shopify.com/s/files/1/0430/9273/8201/files/58244642895.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3964/files/41025191808.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/goguzevadabiko.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1607/files/77455179113.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/79496024978.pdf
    • https://cdn.shopify.com/s/files/1/0446/5616/5027/files/tivetomorade.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/wukate.pdf
    • https://cdn.shopify.com/s/files/1/0437/9977/3341/files/vobafofinorafi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/visotafebamosumen.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/nelolitumeporafimulujaziz.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_off0000570c.bin
398af1f949b3943522ed234e652dabddfeb468d1bcf4335d5a4f8c7b6691b13c
pdf-font-stream PDF embedded font (sfnt) at offset 0x570C 5068 bytes
font_01_sfnt_off00006823.bin
fb8609ede60b838ff3995c4be9d508743a42c3f68d1fec683a0bf32ccde2d6dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6823 9856 bytes