Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c7db200df23454…

MALICIOUS

PDF

44.3 KB Created: 2020-08-22 06:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb3cd69031f5311079c9120ecbe4b4b5 SHA-1: e47b9365b174478186dd926cf6e28cd8f3c4bdb6 SHA-256: 39c7db200df234545e16e5f0ccdc4febab70a6c27e33d037ae3b7166eb37f84f
150 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text referencing 'Picsart gold apk latest version' and the malicious URL, suggesting a lure to download potentially unwanted software. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting a malicious distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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.ru/pify?keyword=picsart+gold+apk+latest+version
    • http://files.judithgoldstonedesigns.com/uploads/1/3/1/6/131637147/9455019.pdf
    • http://files.somonaukfire.org/uploads/1/3/2/6/132695329/misisiba.pdf
    • http://files.wallacesmithphotography.com/uploads/1/3/1/3/131379049/4099069.pdf
    • http://files.pacificcoastchorale.org/uploads/1/3/1/6/131637136/pibapekatonar.pdf
    • http://files.annmariedonnelly.com/uploads/1/3/0/7/130775331/1a79707eb7c64d.pdf
    • https://cdn.shopify.com/s/files/1/0437/5409/4743/files/59563054120.pdf
    • https://cdn.shopify.com/s/files/1/0434/4823/8236/files/android_device_manager_for_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/sopilakosedozokujaxufise.pdf
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/fawurodedosa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1496/2848/files/directive_template_angular.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/various_functions_of_human_resource_management.pdf
    • https://cdn.shopify.com/s/files/1/0435/2271/9912/files/78955727543.pdf
    • https://cdn.shopify.com/s/files/1/0435/9625/1304/files/zaxuweliduzijotomet.pdf
    • https://cdn.shopify.com/s/files/1/0449/7784/8488/files/air_pollution_causes_effects_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/60812308820.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/soil_erosion_definition.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_off000065b9.bin
34ef601239fea9185f9c2bde9c2c9033d0d47c85dfb3f022309f09ffbc864cf8
pdf-font-stream PDF embedded font (sfnt) at offset 0x65B9 5368 bytes
font_01_sfnt_off000077fd.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
pdf-font-stream PDF embedded font (sfnt) at offset 0x77FD 1800 bytes
font_02_sfnt_off0000808b.bin
cf6aff3156cfea1884a4fccd1262813c1b40c561eac03f1050f9f04c8a9fd86f
pdf-font-stream PDF embedded font (sfnt) at offset 0x808B 10308 bytes