Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dbb542ec986649a…

MALICIOUS

PDF

49.5 KB Created: 2020-08-29 17:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c54c1343ee874acc85fc41593a06517c SHA-1: 42bfd776e7a579403c1a0ce9fede9111d4dc3bcd SHA-256: 5dbb542ec986649a41fb9dc64e888e9144ec795b9d6361437d7c644e11c7551f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt, likely to drive traffic to malicious sites. No scripts were extracted, but the embedded link functionality is sufficient to indicate a malicious intent.

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.me/wix?keyword=4.66+centimeters+to+miles
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_de519511f77a4c08a3ccf7fc9737d993.pdf
    • https://static.usrfiles.com/ugd/b8c837_512ea1efca3748809b0548294fbd1bd7.pdf
    • https://static.usrfiles.com/ugd/c3548c_a4aad54641ca4afcb4916a3701312c45.pdf
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/41618643089.pdf
    • https://cdn.shopify.com/s/files/1/0440/7033/8725/files/defensa_siciliana_variante_del_dragon.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6703/files/banking_regulation_act_sections.pdf
    • https://cdn.shopify.com/s/files/1/0433/9394/1671/files/after_effects_intro_templates_shareae.pdf
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/cache_cleaner_apk_android_2._3.pdf
    • https://static.usrfiles.com/ugd/b8c837_84ee71002a7a480796b8404d892fec90.pdf
    • https://static.usrfiles.com/ugd/b8c837_84f8ae46630a4b688afbf3f941bb323a.pdf
    • https://static.usrfiles.com/ugd/b8c837_35a1209f8ae74410a367f35e8100722f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ea41ad8af7544b85a84fa16b69343393.pdf
    • https://cdn.shopify.com/s/files/1/0435/8465/1423/files/basic_security_testing_with_kali_linux.pdf
    • https://cdn.shopify.com/s/files/1/0434/9201/6280/files/fuwugubozufobozoxugepogus.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5026/files/4937071425.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3069/files/36663095169.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/37879442645.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dd0.bin
7fbce61b719902cb0c35f8e46d3e925c65a718ece6c625082a0834097a401aa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD0 4700 bytes
font_01_sfnt_off00006da1.bin
b777033f6d9dadec9aa6112f37e6c1975f856c27af617cea02fb2f821753f14c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA1 12160 bytes
font_02_sfnt_off00009504.bin
f5af9106937d28499c8a0aa4e522713e547754d2a3ef6a3cf18b42fa2f6b3b44
pdf-font-stream PDF embedded font (sfnt) at offset 0x9504 16284 bytes
font_03_sfnt_off0000aa92.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA92 4324 bytes