Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e03341601b0de4…

MALICIOUS

PDF

46.8 KB Created: 2020-08-27 21:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9323e58d70b30e796bce8e8fdd26f2d8 SHA-1: 7758ca8f8ea6275400aee79d31d40edc166ca59d SHA-256: 08e03341601b0de4369f6abb2a9c1720ae4f4cc38e1e873e2f81156dad2cd1c6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one critical heuristic identifying it as a link farm pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=1998+yamaha+timberwolf+250+service+m', which is also flagged as malicious. This suggests the primary purpose is to lure users to malicious sites, likely for phishing or distributing further malware.

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=1998+yamaha+timberwolf+250+service+m
    • http://govavira.josuetejeda.com/uploads/1/3/1/0/131071252/3633161.pdf
    • http://files.cheeselouisefoods.com/uploads/1/3/1/1/131164460/d66bdf0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/9942/2881/files/labavujawaxumagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/95094736795.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/32775240695.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/tupolopagavalojof.pdf
    • https://cdn.shopify.com/s/files/1/0435/4224/9631/files/43721956737.pdf
    • https://cdn.shopify.com/s/files/1/0432/3105/1931/files/wovajuk.pdf
    • https://cdn.shopify.com/s/files/1/0445/4963/6255/files/nodijebubuvigovepuvotus.pdf
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/zubobisevesij.pdf
    • https://cdn.shopify.com/s/files/1/0464/9415/4904/files/boguxita.pdf
    • https://cdn.shopify.com/s/files/1/0431/1246/4535/files/examen_ceneval_2018.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/zijagejolaniw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25346701784.pdf
    • https://cdn.shopify.com/s/files/1/0433/9082/8700/files/periodic_table_blank_printable_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0466/2512/8613/files/zalafelasar.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7333/files/20756974267.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_off00005f1f.bin
27f8723b7e7e095dafec432cc5f074380d4691b8192be2311ff61db7c2712d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1F 5904 bytes
font_01_sfnt_off00007351.bin
04c6368ecbe1841db79c4d94490145ae0c55409b61d60e22bb85b044654dc27d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7351 14224 bytes
font_02_sfnt_off00009fd6.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD6 4324 bytes

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