Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d994b4a5e3d5b3…

MALICIOUS

PDF

35.9 KB Created: 2020-08-21 02:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d49d52e258b73c938e137b7ef7819d0 SHA-1: 30e24c65728b57fb4473c8c3eed1c247261d16c1 SHA-256: 39d994b4a5e3d5b3cf099b531716b248f53093bcfd725c80d4fb036cb308a54a
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL is https://ttraff.cc/pify?keyword=arlington+county+water+and+sewer+manual, which is presented within the document body. The document's structure and embedded links suggest a tactic to drive traffic to potentially malicious content, masquerading as a technical document.

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/pify?keyword=arlington+county+water+and+sewer+manual
    • http://titumeme.radinaflowers.ca/uploads/1/3/2/6/132681821/da4deca.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6188/files/25488422345.pdf
    • https://cdn.shopify.com/s/files/1/0436/7482/8953/files/37756557208.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/zazuligizesosal.pdf
    • https://cdn.shopify.com/s/files/1/0434/5852/7394/files/archicad_19_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/neremagiz.pdf
    • https://cdn.shopify.com/s/files/1/0440/6679/9766/files/17886326144.pdf
    • https://cdn.shopify.com/s/files/1/0433/7565/7125/files/triple_integrals_in_cylindrical_and_spherical_coordinates.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.pdf
    • https://cdn.shopify.com/s/files/1/0435/3749/8276/files/loruwubupegow.pdf
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/zilakuravizuwodotukup.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/50162153700.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_off00004235.bin
d4fd6bc0cfed7468cfde78c8969d4a1f8c99151fbc351588c641d956f51616d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4235 5324 bytes
font_01_sfnt_off00005445.bin
109bb9cad5486f549543006b117df9be858e606ebbdb43c3fa75e7fba639bff4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5445 9480 bytes
font_02_sfnt_off000074c8.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x74C8 4324 bytes