Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b28a7a255366dbb…

MALICIOUS

PDF

44.4 KB Created: 2020-08-06 12:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e22ee6b01bcfd0957c160436dd8b2f00 SHA-1: d8edf22394576fd828cdbfd19478afe08259fa15 SHA-256: 0b28a7a255366dbbce75818e497d9b7fefced2ce89d91c70705fd12178b5b759
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to host numerous PDF files. One of the primary links directs to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is part of a phishing or malware distribution scheme.

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.ru/pify?keyword=awaken+the+giant+within+you+pdf+download
    • http://files.tracyeducatorsassociation.org/uploads/1/3/1/4/131453256/c9142413b0a60.pdf
    • http://files.elmoreyoungengineers.org/uploads/1/3/1/4/131453867/2b9dcd.pdf
    • http://puvobes.kenziemorganphotography.com/uploads/1/3/0/9/130969742/notafegupamidujebe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/walter_gropius_biography.pdf
    • https://cdn.shopify.com/s/files/1/0437/8660/0609/files/14607480978.pdf
    • https://cdn.shopify.com/s/files/1/0440/7571/2664/files/colloquial_arabic_of_egypt.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/who_am_i_casting_crowns_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/1555/9573/files/golden_sun_the_lost_age_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0706/files/bodobe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0730/files/gesafibib.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/wolisawizixilejejebevorul.pdf
    • https://cdn.shopify.com/s/files/1/0440/1748/3934/files/motuzojaligo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/13491826387.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27039997465.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/84849897132.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/glory_john_legend_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/alcohol_phenol_and_ether_ncert_solution_download.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_off0000623b.bin
9056a65a90e00cc1684c1044c87110a08f5923ebd8921eac90c44c9cfb77f0ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 5156 bytes
font_01_sfnt_off000073e2.bin
e28be1365a7c805fcccec0e6e911098a3f620e552c3d62fbb7e2da02c165941e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E2 9988 bytes
font_02_sfnt_off00009622.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9622 4324 bytes

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