Malicious PDF — malware analysis report

Static analysis result for SHA-256 396b6375b09a40ca…

MALICIOUS

PDF

40.5 KB Created: 2020-08-31 17:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11f8fdc1629938b68918db622e23def6 SHA-1: 9015b1679103a9fe3d3d5cc873ac24a6eb39301b SHA-256: 396b6375b09a40ca0d1425bad6ff4cbddbbc4b01715bfdae4025b99b971be473
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=arcgis+license+server'. This URL is embedded within the document body, suggesting a social engineering lure to trick the user into clicking it. The PDF also contains a large number of external links, many hosted on cdn.shopify.com, which is flagged as a PDF link farm. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=arcgis+license+server
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/rogunumetegege.pdf
    • https://cdn.shopify.com/s/files/1/0430/4171/8426/files/marathi_calendar_2020_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5628/files/43976690080.pdf
    • https://static.usrfiles.com/ugd/40512e_f24279b6951649a090ebb11eab62621e.pdf
    • https://cdn.shopify.com/s/files/1/0439/0351/6827/files/nerotezokowemixisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0993/files/53867190624.pdf
    • https://cdn.shopify.com/s/files/1/0464/3337/0264/files/kebafobivinuxexami.pdf
    • https://cdn.shopify.com/s/files/1/0460/9877/6228/files/dead_by_daylight_eac_bypass.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/taburododafubemuvofuz.pdf
    • https://static.usrfiles.com/ugd/df4650_b71b0e524b2f4edc99a32e539f74b82c.pdf
    • https://static.usrfiles.com/ugd/2e79a6_1d4917d7e0b54c81b594b737616c17ba.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_off000061e6.bin
a6ecae3edb413b64086fee32cae446c24fdd0e6586048d132305d04b09f8281e
pdf-font-stream PDF embedded font (sfnt) at offset 0x61E6 4808 bytes
font_01_sfnt_off0000725f.bin
e5b9d5965709509bfcba0b8117340cef6e348d6a2a2134eb4f90d46083622a4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x725F 10236 bytes