Malicious PDF — malware analysis report

Static analysis result for SHA-256 733e488f9137ca6f…

MALICIOUS

PDF

43.9 KB Created: 2020-08-14 20:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e772033ef9f913251ab65739d68e50f SHA-1: 49404169fe7634cf3445b515ee3b8f9b904fb561 SHA-256: 733e488f9137ca6f053ba3d7163fab463f794066de078b8132bbea4442bc6080
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, with at least one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting an attempt to lure users to malicious content. The presence of numerous links points towards a link farm or SEO spam campaign, potentially leading to phishing or malware distribution.

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=tra%25C3%25A7o+falciforme+e+altitude
    • http://nuraxod.m.wchqfm.com/uploads/1/3/1/3/131379833/958a31.pdf
    • http://files.lauribenblattconsulting.com/uploads/1/3/1/8/131871992/8502216.pdf
    • http://mojowap.crawfordphoto.org/uploads/1/3/0/8/130874457/b2061bc26b3.pdf
    • http://files.rabbitcustom.com/uploads/1/3/1/1/131164112/lebonor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/6154817399.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/sogivixanodujuxepisana.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/mexenitaxomiraki.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/oxford_bookworms_library_stage_6_the_woman_in_white.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/40402590862.pdf
    • https://cdn.shopify.com/s/files/1/0436/7984/2457/files/gakalekan.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6027/files/36345634411.pdf
    • https://cdn.shopify.com/s/files/1/0429/7805/0201/files/wajifunezefe.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/37267241831.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/98710439479.pdf
    • https://cdn.shopify.com/s/files/1/0437/6851/2669/files/38654173474.pdf
    • https://cdn.shopify.com/s/files/1/0434/1936/9628/files/busta_rhymes_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/betowawon.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ab3.bin
c49b8ea29dd8b0fb0ce6b798aba92510cc138ba906463107f02d1dee24829d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB3 5120 bytes
font_01_sfnt_off00007bba.bin
79674b1522363d0bd8d4596cde47a9352559c7683bc8f58bd7a5e01735f6b920		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBA 12460 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.