Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a8c1ff1bccb631d…

MALICIOUS

PDF

38.1 KB Created: 2020-09-03 10:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0599702388240e481a41ff145abaa6cf SHA-1: 64a6000b2d8eb0d8f2df8dd7bea043b8a001406f SHA-256: 8a8c1ff1bccb631df8595ae9b47cdf02e742e616450dffec3110212c0f07575f
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for phishing or malware distribution. The document body, though heavily obfuscated, appears to reference a Bosch dishwasher installation manual, suggesting a lure to entice users to click the malicious link. The presence of numerous external PDF links further indicates a link farm, likely for SEO manipulation or to host further malicious content.

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.me/pify?keyword=bosch+dishwasher+shpm98w75n+installation+manual In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/0a0016_1aaeccd700094e6d9140bbaa3bfbea25.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b222ea_50f7c9a7a7a7434aaa41996137d24086.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ab059d_f10f8b34098c4c4eb4c5b20f03dbc7dc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c34aa9_b5e18c98048943b995cc89f477bfbc2f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7aabb2_543eb7283ce944b3825e2cbb36e0361f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0d2908_c5045de104064ac8bd9a40fff743c7c6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c836c3_4ba455dcc2bf40efa1b12831ee80b85e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/tivosebozufaxuvulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/merry_christmas_drake_and_josh_full_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0625/4504/files/captain_marvel_movie_in_tamil_isaidub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/6317798792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/zulumodogiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/lp_antepartum_bleeding.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3838/9925/files/fufawapefuzifaburunime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/genesis_kodi_2016.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4857 5888 bytes
SHA-256: f9c36ca21c074335c945212f7ab757e79c996afddf5b74f8416bda7763c76864
font_01_sfnt_off00005c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C55 9468 bytes
SHA-256: efc17a28c378d36d8042f6ae43d69951d6491544d13f06708f8e2b757e272f24
font_02_sfnt_off00007ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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