Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a5bbb6b12ba0016…

MALICIOUS

PDF

45.7 KB Created: 2020-08-25 03:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db34846ae53cefcdd70181985d2922cb SHA-1: 8e23b7b3846151ea74445fa19c49e5ff4c3c394d SHA-256: 1a5bbb6b12ba001632affaeb524b73ea8317da991d0fcfea65691d45952fbbf5
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to 'Chucky movie collection in tamil'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy. The primary malicious URL is https://ttraff.com/pify?keyword=chucky+movie+collection++in+tamil, which likely serves as a gateway to 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.com/pify?keyword=chucky+movie+collection++in+tamil
    • http://files.sobreribas.com/uploads/1/3/0/9/130969824/7856055.pdf
    • http://files.ncaaop.com/uploads/1/3/0/7/130740130/28a3be6cd979c.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6149/files/duzon.pdf
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/36845913826.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/36719538421.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/aao_guidelines_sudden_hearing_loss.pdf
    • https://cdn.shopify.com/s/files/1/0428/7610/8956/files/arranging_numbers_from_least_to_greatest_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/5932003598.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/wakupigavaja.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/65693674575.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_off000068de.bin
8a33b26c81f4b2faf858de29e32f102a23d1f08e52c114f237e080a6c479c983
pdf-font-stream PDF embedded font (sfnt) at offset 0x68DE 4896 bytes
font_01_sfnt_off0000796d.bin
a7789af921f60d1414a46050e2d98570944eb8753fb2497f0886f2e9ea36ffab
pdf-font-stream PDF embedded font (sfnt) at offset 0x796D 3216 bytes
font_02_sfnt_off0000866f.bin
2d2ee91dc33718fc65c948b8623512ac91ab32453a4284a0be25b3e6b74bb7a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x866F 10156 bytes