Malicious PDF — malware analysis report

Static analysis result for SHA-256 44be5350d7ba066e…

MALICIOUS

PDF

46.4 KB Created: 2020-08-22 16:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcf0a44d04a794ca17eda941f98b2422 SHA-1: 8ef60a1f21767ea8eb911e6fb14dfaf1c1090240 SHA-256: 44be5350d7ba066e771bc0fa5f8caa265acb697992d989ff1f6bf69bbdbaf356
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 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL is likely intended to redirect the user to a phishing or malware distribution 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.cc/pify?keyword=architecture+cv+word+format
    • http://files.grantpreddy.com/uploads/1/3/0/7/130776403/gexufovoxufamedigi.pdf
    • http://ferifam.cocktailsnponytails.com/uploads/1/3/2/8/132816066/4740956.pdf
    • http://files.theadventuresofraz.com/uploads/1/3/2/8/132814427/kaveniz.pdf
    • http://files.authorphilip.com/uploads/1/3/0/8/130813546/e81940c62.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/gebapamerewub.pdf
    • https://cdn.shopify.com/s/files/1/0437/7811/3690/files/20017163649.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/brittany_perille_program.pdf
    • https://cdn.shopify.com/s/files/1/0459/9532/7655/files/41494867006.pdf
    • https://cdn.shopify.com/s/files/1/0431/1026/9085/files/40824330805.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/36805780782.pdf
    • https://cdn.shopify.com/s/files/1/0449/6883/7288/files/bon_jovi_live_in_london_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/xufikawon.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/61728175783.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4760/files/7616305148.pdf
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/39727720381.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_off00006956.bin
ca042512cc74fd8db17d1c772c43abceb4fbdad8eb9b78ae398fc687f1c5dfb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6956 4968 bytes
font_01_sfnt_off00007a44.bin
f907e0bc9e38c64b50a83a9c502cf19bff6474d946bbbc5a802251b76c8bf38c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A44 10760 bytes
font_02_sfnt_off00009ed3.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED3 4324 bytes