Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5318d464ab7baf…

MALICIOUS

PDF

168.7 KB Created: 2020-08-04 13:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c740682c644c94cf0564ae79e8e27421 SHA-1: 998536a4bbbfef53415f867527a7ae0172bb169f SHA-256: 8e5318d464ab7baf6ebdf02a935aece8d349a91908f90e5087fd5e5c76165833
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.cc/pify?keyword=morphology+and+taxonomy+of+fungi+pdf' is the primary indicator of malicious intent, likely serving as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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/pify?keyword=morphology+and+taxonomy+of+fungi+pdf
    • http://files.straymongrel.com/uploads/1/3/1/8/131871894/4cc60b638a0f8e.pdf
    • http://files.flamelilyarts.com/uploads/1/3/0/7/130776514/580159.pdf
    • http://files.audreyaliwarga.com/uploads/1/3/0/9/130969151/waseretubadepulef.pdf
    • http://files.crushcop.com.au/uploads/1/3/1/4/131483097/mivujexaxinotevapiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/2663/5162/files/52121301758.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/faleno.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/26321318862.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/74031434008.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2717/files/78645735213.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/4451044823.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1400/files/dujugefonakisijojekomigan.pdf
    • https://cdn.shopify.com/s/files/1/0431/3530/3831/files/fatojuke.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49186839350.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/dikewosibuwizego.pdf
    • https://cdn.shopify.com/s/files/1/0438/7491/0376/files/69304624465.pdf
    • https://cdn.shopify.com/s/files/1/0439/6243/3694/files/rokutazevokewulizimevu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7321/files/xutokorizoronikalorujaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8679/0304/files/ralofexusitepiwizuzilojel.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_off0002503f.bin
2f6ff3ea29b3521e20dacac91bb09b8d49c9d44990f32bebbfdab35abdbdaa18
pdf-font-stream PDF embedded font (sfnt) at offset 0x2503F 5452 bytes
font_01_sfnt_off000262b8.bin
7775e8e7c4329a1c5bd112c001158d8940360085fc48f9208aadc231de0e3d90
pdf-font-stream PDF embedded font (sfnt) at offset 0x262B8 1716 bytes
font_02_sfnt_off00026b5f.bin
5dec5ed1c56a2c441a2cefca173024f22d926489550b80e8c3822529e02741e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x26B5F 12524 bytes