Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a3637a4c1d9d94…

MALICIOUS

PDF

54.6 KB Created: 2020-08-19 23:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cafa562607ea862d09eccc168f7244da SHA-1: ae645fc952da0b10c210669b22236485af31e44c SHA-256: 14a3637a4c1d9d94727af662812ef3d20ae88544b301dcb0e3b96348d962f565
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware delivery.

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=brawl+stars+skins+mod+apk
    • http://selenujam.asafcircus.com/uploads/1/3/1/4/131438019/bafifig.pdf
    • http://files.structuralbodyworkhawaii.com/uploads/1/3/1/4/131406049/gazerag-lekazavewekafe-segopofopabone.pdf
    • http://xogax.dunlapcoc.org/uploads/1/3/0/9/130969242/4076c56e132e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/7321/5387/files/wuwetojebepiminitaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7708/files/stacking_the_deck_fallacy.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/45642444715.pdf
    • https://cdn.shopify.com/s/files/1/0437/0880/9384/files/92085082916.pdf
    • https://cdn.shopify.com/s/files/1/0433/2866/7798/files/21_irrefutable_laws_of_leadership_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/10088574731.pdf
    • https://cdn.shopify.com/s/files/1/0432/1450/4093/files/7358671770.pdf
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/29823756157.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/wajodamudazepu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9177/2063/files/80639249887.pdf
    • https://cdn.shopify.com/s/files/1/0451/7547/2279/files/susifadeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9119/0167/files/71929234394.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/mopituzexijajevalosubij.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000659f.bin
d5cb9f0fba1c170a0bab6dabd9bb33e0f06600a756f39c76a74c9a040ac44732		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659F 4980 bytes
font_01_sfnt_off00007673.bin
b7dd2cdc91879d301eaf29a7155739d89bf5cc6572c99a31f11bac5386ade2ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7673 3096 bytes
font_02_sfnt_off00008368.bin
a50c2ffb944951cc26b1fefde09146ca8c3a27b030a2c928bd92c0b385b421c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8368 10568 bytes
font_03_sfnt_off0000a7bc.bin
e1d9fc53e24240604d44f1971ef34c78f2f8a917a673f65ae5e60678f75d8116		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BC 16612 bytes
font_04_sfnt_off0000be9d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9D 4324 bytes

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