Malicious PDF — malware analysis report

Static analysis result for SHA-256 611c20055f955530…

MALICIOUS

PDF

53.8 KB Created: 2020-08-17 04:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db93a49663cfe13e129d4531ce72f9a1 SHA-1: f63dda007062ab118f2a7302dd1813646ba155d6 SHA-256: 611c20055f95553091c17d109d418255386be8b9a2210b493073615c5c7875be
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=best+app+for+free+bollywood+songs'. The document body, though partially corrupted, also contains this URL and a large number of other PDF links, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites.

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.com/pify?keyword=best+app+for+free+bollywood+songs
    • http://jolovena.bluebow.org/uploads/1/3/0/7/130739704/6c1f1c8d83.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/kotejuveteru.pdf
    • https://cdn.shopify.com/s/files/1/0435/6967/6451/files/sadap.pdf
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/juzilibujurijizagolavi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9182/files/xorudijimofuxolufatipiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/13528303887.pdf
    • https://cdn.shopify.com/s/files/1/0427/9648/2727/files/kendra_lust_booty.pdf
    • https://cdn.shopify.com/s/files/1/0447/8281/3341/files/hernia_umbilical_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1358/7623/files/96095578870.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3929/files/english_language_course.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5165/files/jupixagefurejasedegekap.pdf
    • https://cdn.shopify.com/s/files/1/0434/4968/0028/files/25201437859.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/derawedajuzenuzoragivuloz.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007030.bin
d6de3a30fc1365d68ee158b1eb615d516982c77a6d35e6397ed6318be12eac67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7030 5592 bytes
font_01_sfnt_off00008352.bin
615f89e847e8a84ebe2f8e4d0030bbcf2c7164a3748183fc38d679476cf67db9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8352 3484 bytes
font_02_sfnt_off0000911e.bin
cfe7eb202e0363b10a7098104f6c533603be1247a158c4f5693a6f2254a9b8b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x911E 10288 bytes
font_03_sfnt_off0000b47b.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB47B 16164 bytes

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