Malicious PDF — malware analysis report

Static analysis result for SHA-256 66794f6e6625219a…

MALICIOUS

PDF

45.7 KB Created: 2020-08-22 06:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 325194812e67d6d2c55d4722283ef191 SHA-1: f56ddd4d96dfcd252149759f0d8731f3555163e2 SHA-256: 66794f6e6625219ac2b394521003cf119c91a8a8e50a66db7a709de7a05283ce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is `https://ttraff.cc/pify?keyword=best+apps+2019+android`, which is flagged as a malicious redirector. The document body contains obfuscated text and URLs, suggesting an attempt to lure users to malicious content.

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=best+apps+2019+android
    • http://zifaritij.morganofriverton.com/uploads/1/3/1/4/131453674/sotadatononi_gikonajiwixelov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0447/0459/6122/files/24879167252.pdf
    • https://cdn.shopify.com/s/files/1/0428/4517/5971/files/tinkers_best_pickaxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/20131180934.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9029/files/cycle_wala_game_video.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/99211395128.pdf
    • https://cdn.shopify.com/s/files/1/0440/7967/7590/files/fnma_loan_servicing_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/xorofarokul.pdf
    • https://cdn.shopify.com/s/files/1/0441/0369/6536/files/bagaruk.pdf
    • https://cdn.shopify.com/s/files/1/0451/5794/1402/files/guide_auto_entrepreneur_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/0336/0926/files/british_colonies_in_africa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4659/1895/files/safewezozinatunibuleturud.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/ccdc_9a_2020.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006721.bin
3426ad49d86f291e1a239c92484bf901ac2b79bdc13e552f12e564ef10cc55a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6721 5240 bytes
font_01_sfnt_off000078ef.bin
dcd74982a8295279d9b65bf527301f9ab4147708578433f82d59521babf38e2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x78EF 10272 bytes
font_02_sfnt_off00009c0c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C0C 4324 bytes