Malicious PDF — malware analysis report

Static analysis result for SHA-256 090d9db983725a09…

MALICIOUS

PDF

44.0 KB Created: 2020-09-04 18:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 352cbd155db16453e04b3d0c7087dee9 SHA-1: 26cd005495558ed8a8054331a3d056c83452c082 SHA-256: 090d9db983725a09039a4aa0dbeaabf8761a13f0a3ab8b4cd8ea4706687c837e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF SEO link farm. The primary malicious URL, 'https://ttraff.club/wix?keyword=android+8.+0+adaptive+icons', is flagged as a known malicious redirector. While no scripts were extracted, the sheer volume of links and the presence of a malicious redirector suggest an attempt to lure users to harmful content, likely as part of a phishing or scam campaign.

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.club/wix?keyword=android+8.+0+adaptive+icons
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/3286101956.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/55830323574.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83142526711.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/statistical_analysis_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0461/8344/8730/files/nice_guys_nigahiga_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2767/files/ccmta_driving_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3654/files/77798648041.pdf
    • https://cdn.shopify.com/s/files/1/0440/4484/5206/files/java_se_not_responding_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/11888940089.pdf
    • https://cdn.shopify.com/s/files/1/0436/9262/1978/files/kafikurojo.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_2ba541e7a5274f06b3380a408c7bba6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0697826bc07b4bbaa386c49c0ddceb51.pdf
    • https://static.usrfiles.com/ugd/30ea26_b75d376c98f7428da3ce9ba2c62aa1b5.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/99225919339.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/tv_guide_itv_live.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/57351540848.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3387/files/45935568858.pdf
    • https://cdn.shopify.com/s/files/1/0466/4999/9525/files/breath_of_the_wild_how_to_dive.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cd1.bin
9f1e8057731e77c3d053999599a0328a99a6882a7d4e63dc4160bcc51fcea194		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD1 5452 bytes
font_01_sfnt_off00007f75.bin
cd43dedde9b7c5d364ae35d7d1272410e317b39c3ee963397a59460a080b489f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F75 10420 bytes

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