Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ae714fafd8ed23…

MALICIOUS

PDF

62.2 KB Created: 2020-08-19 04:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 102d9fa9999447fbd14b653366680f5d SHA-1: 038996d30999abec539ee53553ac9a588e912800 SHA-256: 94ae714fafd8ed2357d5d11f1817917f74dc992c7b91403d24d3824340623865
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, identified as a link farm, with the primary malicious redirector being ttraff.cc. This suggests the document's purpose is to lure users to potentially harmful sites. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=patofisiologi+abortus+imminens+pdf
    • http://files.mindbody-solutions.net/uploads/1/3/1/4/131453917/a4bd0bd5.pdf
    • http://files.luxurytophomes.com/uploads/1/3/0/9/130969761/9038335.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/1984784066.pdf
    • https://cdn.shopify.com/s/files/1/0439/4418/1928/files/87592205956.pdf
    • https://cdn.shopify.com/s/files/1/0439/4598/4158/files/addition_and_subtraction_word_problems_year_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/suxesigubixafikise.pdf
    • https://cdn.shopify.com/s/files/1/0431/4572/4055/files/31945076451.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/62351767595.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/4120807484.pdf
    • https://cdn.shopify.com/s/files/1/0450/1346/7286/files/ginobamobanadunowodizux.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/92992250051.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/cause_and_effect_essay_outline_template.pdf
    • https://cdn.shopify.com/s/files/1/0449/2899/1399/files/office_email_writing_samples.pdf
    • https://cdn.shopify.com/s/files/1/0429/1097/4108/files/75598151250.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/17660050762.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/95802801656.pdf
    • https://cdn.shopify.com/s/files/1/0434/9886/4804/files/bosch_automotive_handbook_7th_edition_free_download.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_off0000a67c.bin
033242b9a185cd4a13965865acaf073431e898e1aba70593d8789aa9a32a945f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA67C 5384 bytes
font_01_sfnt_off0000b8a4.bin
9096e0c40a38ae20113706033fb0c0760309058ea7d0b13d6736ec02147189d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A4 10752 bytes
font_02_sfnt_off0000dd5e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5E 4324 bytes

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