Malicious PDF — malware analysis report

Static analysis result for SHA-256 46511771a4ab753f…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 16:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 100aa185f4c89efebc155abd01b4b542 SHA-1: ad9da9619caa1addffd190c4ca586a03f9e6131e SHA-256: 46511771a4ab753f51a177504ea70d0aa01e05dc5a881e2db1f64bfbb051ec26
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a lure related to sheet music. The presence of numerous Shopify links, many pointing to PDFs, indicates a link farm strategy. The primary malicious URL is https://ttraff.com/wix?keyword=fairouz+sheet+music+piano, which is flagged as a malicious redirector.

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/wix?keyword=fairouz+sheet+music+piano
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/751776448.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0437/3823/5031/files/27669879339.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1567/files/ate_ve_su_2_oku.pdf
    • https://cdn.shopify.com/s/files/1/0436/7787/6377/files/tutazagurawexopogafoku.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/refrigeration_air_conditioning_and_heat_pumps_fifth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/9090/3193/files/organelos_celulares_unam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9095/1848/files/celebrate_recovery_lesson_18_grace.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2305/files/desusaxuwopefadaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/6858/7174/files/torukakirabolepazepuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/7496/7965/files/dorejibiriwazolujowazeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/7450/9213/files/mizamupinesovigaxafekoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7399/4905/files/tuxaxufemisatekofone.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5680/files/jasper_jones_movie_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/0764/5595/files/puvamibaxopifoduka.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/centripetal_acceleration_lab_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6666/files/wotevokurowij.pdf
    • https://cdn.shopify.com/s/files/1/0440/1577/9990/files/88945543865.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b14.bin
39db0962a1b1ebd703dc46beeb9ea723ded4fe3862557625490121fc617be1ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B14 5148 bytes
font_01_sfnt_off00005c76.bin
bd255a96f05b9fa2e6e60e2baf4f4f7a6344be3742929e78120a30e5789e722c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C76 9492 bytes
font_02_sfnt_off00007d3e.bin
a7d3dee08df1f95871e245552f05816c9ea516269d80e51180760430c0052daf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3E 19772 bytes

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