Malicious PDF — malware analysis report

Static analysis result for SHA-256 a741ba37ada7b459…

MALICIOUS

PDF

66.3 KB Created: 2020-09-17 17:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8928cb9570d55f0cef477b84dcf4b6c0 SHA-1: f720ddb95175cd672f01b971c0d898dffdb1209e SHA-256: a741ba37ada7b45988ad19c682163d503b6c1f806d82126220309e6f7acd69a2
128 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, which is also present in the document body. The presence of a 'download button' lure and a large number of embedded links suggests a phishing or scam attempt. The primary IOC is the malicious redirector URL.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/wix?keyword=bill+nye+electricity+video+guide
    • https://92563ff3-e7a0-49f5-92b0-b2b7d8a12f4d.filesusr.com/ugd/912de2_5dc38e63bf43408e97e9d9f0a7d1cd81.pdf?index=true
    • https://66024dc2-abde-42f9-ad0e-b3456db7006a.filesusr.com/ugd/bc79a4_2c6ee41ff6994cf184d5b540c7efa1f9.pdf?index=true
    • https://6bf9273e-fec8-4a8b-9ed1-3dae04385ece.filesusr.com/ugd/18122d_e1048d2e45f84f68806347479d93ab8f.pdf?index=true
    • https://8d5fb729-f0fc-4236-bfd9-29ae2343c087.filesusr.com/ugd/f91cf1_96e220acdd47422fb9f783310ca50767.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/3094/4671/files/w_9_for_non_profit.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/centos_7_terminal_commands.pdf
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/catchment_area_hydrology.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/16801498813.pdf
    • https://cdn.shopify.com/s/files/1/0431/7000/5156/files/boy_scout_uniform_buy_online.pdf
    • https://d7920947-a8b0-46b7-992b-787664918d11.filesusr.com/ugd/e2c223_cc9efc7d2fdc4a41b63eb7a68495dce8.pdf?index=true
    • https://e487579d-e5b9-4f33-b5d4-56c416722661.filesusr.com/ugd/39cb9d_c51ccaf8a1fc4155b0da4d47cd345fc3.pdf?index=true
    • https://bea36fca-46f8-472f-b18f-a0512efc2dec.filesusr.com/ugd/2994dd_de515d80c62340bc9c166b180236db55.pdf?index=true
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b08c.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB08C 2828 bytes
font_01_sfnt_off0000ba86.bin
b036ef8f0ae1194eef6bad392bd9d63c080d5dbe60a515ddffa62300b2cb70b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA86 4812 bytes
font_02_sfnt_off0000caf1.bin
d595cdd16a7e567d1fe929afdc84bfc700121aab2b5841f1e0b7aa8ab3a145c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF1 10132 bytes
font_03_sfnt_off0000ed98.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xED98 4324 bytes