Malicious PDF — malware analysis report

Static analysis result for SHA-256 543a2c5188c6be57…

MALICIOUS

PDF

46.4 KB Created: 2020-08-29 03:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e48daece2c30b42556e540819eb6f989 SHA-1: ba845b2c588123bce708deb32fac7b4802803df2 SHA-256: 543a2c5188c6be570c7724b3d5bbc87ea59ef7940b97691d95a42ff848e1f4e5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a large number of embedded links, constituting a link farm. One of these links, https://ttraff.com/wix?keyword=yeh+dil+hai+punar+vivah+song+downloa, points to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the PDF structure itself is suspicious due to the mass of external links.

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/wix?keyword=yeh+dil+hai+punar+vivah+song+downloa
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/59027990216.pdf
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/luwopujuzelazidulel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/96808028051.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/wuritibejola.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/41682585858.pdf
    • https://cdn.shopify.com/s/files/1/0436/7712/2713/files/97204355943.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdf
    • https://static.usrfiles.com/ugd/b8c837_decc3acde8e745f49dd151d6a3a7a0a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_adb7e61b55394877b0a5de952dd8aee5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c9decf06bb945168334a1066668c8c6.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5645/files/levis_ad_song.pdf
    • https://cdn.shopify.com/s/files/1/0443/2330/7676/files/40354777374.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/calendar_week_numbers_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/9786/3832/files/fefeladudodujesabapoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46905239833.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_off00005501.bin
697442c88ff65a76effa270388777bcf0b05a6333f619b9ae833df4aa8ba7da9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5501 5336 bytes
font_01_sfnt_off0000672d.bin
22215b67c17645a646172041d78c803c576bf8782665f1495a954c6346c9a228
pdf-font-stream PDF embedded font (sfnt) at offset 0x672D 11040 bytes
font_02_sfnt_off00008cd9.bin
e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD9 18776 bytes