Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0dc8c116904591f…

MALICIOUS

PDF

57.4 KB Created: 2020-07-29 02:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bab663097380efc8f2e7e13aafcdf751 SHA-1: 6e2a7df7dbe1347d8d2d97501d9d1199f58e93dc SHA-256: a0dc8c116904591f3db427981bf45b204daae4f2d469ee6e092d746d21d86a21
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=rank+function+in+excel+pdf'. This URL is likely used to redirect the user to a malicious site. The document also contains a large number of external PDF links, characteristic of a link farm, and a heuristic indicating a download button lure. No scripts were extracted from this sample.

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.cc/pify?keyword=rank+function+in+excel+pdf
    • http://files.mellamarministries.com/uploads/1/3/1/4/131437822/dexapikurip.pdf
    • http://files.anna-needlepoint-pearson.com/uploads/1/3/1/3/131380107/novimuwigedud_kapowixuvakivo_gonanafaxupol_tunoribevu.pdf
    • http://files.healthyshmealthy.com/uploads/1/3/1/6/131607053/9250466.pdf
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/72528834011.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/65175241868.pdf
    • https://cdn.shopify.com/s/files/1/0435/8891/1267/files/51671906579.pdf
    • https://cdn.shopify.com/s/files/1/0434/1704/3111/files/3600796314.pdf
    • https://cdn.shopify.com/s/files/1/0433/5730/7039/files/79986176864.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91146339154.pdf
    • https://cdn.shopify.com/s/files/1/0431/2449/0397/files/26188038133.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/2181796853.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2156/files/bezifinanavolefev.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/2059108886.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/leturapufolisowe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7212/7125/files/tuzor.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_off00009cb3.bin
684c7ef75615fc2c66084b1162a98205c3f44d7ae0ce8f7b5e7d6e655cd3f368
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB3 4896 bytes
font_01_sfnt_off0000ad77.bin
7422867622b993877fbb45f2de68f639b6bd8ba1d39d643b50a6bc3f860f7a1b
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD77 13436 bytes