Malicious PDF — malware analysis report

Static analysis result for SHA-256 088abb0d5a7ac897…

MALICIOUS

PDF

54.8 KB Created: 2020-08-16 21:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 290810c5cbde84834dc8ab047d367125 SHA-1: ce80d1e215ec908aa30637ea00a34f26baa88794 SHA-256: 088abb0d5a7ac897e461e0fee80ea86287b66d3c4e8a0cb3d7e951663ad0a82c
154 Risk Score

Malware Insights

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

The PDF contains a lure for a free movie, directing users to a malicious redirector URL. The PDF also hosts a link farm, with many links pointing to other PDFs, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness.

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=bleeding+steel+movie+free++in+tamil
    • http://xeginosaz.amypoe.com/uploads/1/3/1/6/131607239/jebax_wibuzan_wuketetivaveje.pdf
    • http://xanalazi.faustchamberorchestra.org/uploads/1/3/1/4/131437987/6326265.pdf
    • http://duvosi.comalcommunityband.net/uploads/1/3/0/8/130814851/5891412.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/65237794062.pdf
    • https://cdn.shopify.com/s/files/1/0435/4165/9797/files/microsoft_access_programming.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/terigub.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/dopufimar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/natunufipamizof.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5915/files/71112523180.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/wovox.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/imf_bentham_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/5986/1909/files/41025924379.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://www.gnu.org/licenses/gpl.html
    • 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
stream_004_off00007ae0.bin
e144c7b9f5467912fe9087eac3993fefcf71e6ad02cc091edae62f79f7c07aea		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7AE0 8540 bytes
font_00_sfnt_off000068d7.bin
8cc57ad143c53f7e984e29588314f1a197f6b67706870ff2226687a99771d958		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D7 5336 bytes
font_02_sfnt_off00009297.bin
3b39f3e1014ace1b6d4d33f76a3ba8c943b4ea52dfc904cad24b00d8580c5030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9297 10504 bytes
font_03_sfnt_off0000b6c4.bin
f5e4bb380b7768863d0097cce0a009d41e26717999f82f2205aaf848ffd6f845		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C4 16784 bytes

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