Malicious PDF — malware analysis report

Static analysis result for SHA-256 795079e6fafef9e6…

MALICIOUS

PDF

54.6 KB Created: 2020-09-01 08:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6181aaab6db295e11e60c55daa319c75 SHA-1: e5361a5e04eb7dcccd9077fa21bc13bbff12e171 SHA-256: 795079e6fafef9e601ec36cb0f7fb7399a83dd9cb97818e0e050e245112b4dfa
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. The primary malicious URL, https://ttraff.ru/wix?keyword=a+savita+ag+savita+dj+song, is a known redirector. The document body, though heavily obfuscated, contains this URL, suggesting it's intended to lure users to malicious sites. The presence of a link farm further supports the attack pattern of directing users to potentially harmful 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.ru/wix?keyword=a+savita+ag+savita+dj+song
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/mugen_1._0_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4840/files/american_life_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/5123/8047/files/ios_developer_resume.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3681/files/warframe_sentinel_mod_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/3956/2645/files/change_name_minecraft.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_3cb3c6535a3f42c491e97b6bbefd0e9f.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_125bdc1695504e85952d3bd5bb1b2b99.pdf
    • https://static.usrfiles.com/ugd/6846fe_a193198a7b45446c8d7546cd8a948ca3.pdf
    • https://static.usrfiles.com/ugd/5ecadc_30beb0baae1a40f493f681607cbfbf2f.pdf
    • https://static.usrfiles.com/ugd/5de1df_6899c94204194e5ab795c1df868d7661.pdf
    • https://static.usrfiles.com/ugd/b8c837_007c84f8449f45b1aed9b09d4a4f3800.pdf
    • https://static.usrfiles.com/ugd/b28561_93cf03d78e8942b895df8b7de3af7f9a.pdf
    • https://cdn.shopify.com/s/files/1/0448/3137/5521/files/final_fantasy_xiv_installer.pdf
    • https://cdn.shopify.com/s/files/1/0465/2525/1742/files/takegogokirosiweve.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4266/files/63229692393.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/6217241543.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_off000081ad.bin
17a97b86d4733faec425cca9f3d0df005fde1494c531f61c09f6272e0b13ade1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81AD 4660 bytes
font_01_sfnt_off00009192.bin
a87150a00e1e6bb6de42fd8c5c1a3fbad29de8804e70237f322d643bdb4fc5b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9192 14784 bytes
font_02_sfnt_off0000bf7c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7C 4324 bytes

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