Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc3f15663fe6e4d…

MALICIOUS

PDF

56.5 KB Created: 2020-08-20 05:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11085a9626ef1860192a490e1cd9e7ab SHA-1: 42cc0160d125ccd8ffd7715560f048fd35c32e60 SHA-256: ebc3f15663fe6e4dd9a9a0705ebac52efac2c3d8d3d76435474ccdeaa80818a1
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com'. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be luring users to a malicious site via a deceptive link within the document.

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=agricultural+extension+and+rural+development+pdf
    • http://files.studiosirishop.com/uploads/1/3/2/6/132681479/xajipi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/febuluvepol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0648/3876/files/all_i_want_for_christmas_is_you_piano_easy.pdf
    • https://cdn.shopify.com/s/files/1/0455/4385/0149/files/bessel_filter.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/83129877015.pdf
    • https://cdn.shopify.com/s/files/1/0429/2529/3724/files/adobe_reader_for_windows_10_64.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/talking_angela_hack_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5279/files/71496475403.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2821/files/32105301941.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/64759639395.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/rapegajaworobofozipim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nezaneseku.pdf
    • https://cdn.shopify.com/s/files/1/0440/8829/5576/files/72242540405.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_off000091d4.bin
1c8cf41071c0b02ea77d9b3d59f5511e16a2777788702f4416ed5c0236bc4db3
pdf-font-stream PDF embedded font (sfnt) at offset 0x91D4 5472 bytes
font_01_sfnt_off0000a462.bin
12ee3d0e74023916e057fbe43f43db2a35faa1805a1c440bd5fddc30d82d7ecf
pdf-font-stream PDF embedded font (sfnt) at offset 0xA462 9876 bytes
font_02_sfnt_off0000c637.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xC637 4324 bytes