Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e8b12197a58bf3…

MALICIOUS

PDF

43.3 KB Created: 2020-08-20 07:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2904048fb49484fb6de1f7d2dc1f8873 SHA-1: 9c29fca12ee700d737b22e5fdc1e4ecbe54693b4 SHA-256: c7e8b12197a58bf316b93fe1a9970cb9ad8523c9f0ab33d4bcc6d824cc2eee46
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=quizas+quizas+quizas+andrea+bocelli'. This URL is embedded within the document body, which also contains numerous other links to PDFs hosted on shopify.com and other domains, indicating a link farm strategy. The ML classifier also strongly flagged this PDF as malicious. The primary intent appears to be redirecting users to malicious infrastructure.

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=quizas+quizas+quizas+andrea+bocelli
    • http://pulujefim.dkgwa.org/uploads/1/3/0/8/130813747/1809009.pdf
    • http://files.meghaves.com/uploads/1/3/2/6/132695698/lolaf.pdf
    • http://files.recoveryspecialistsinrome.com/uploads/1/3/1/6/131637325/sajogomi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/sobuvoru.pdf
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/kapubovafapisino.pdf
    • https://cdn.shopify.com/s/files/1/0438/4587/7922/files/65374778122.pdf
    • https://cdn.shopify.com/s/files/1/0451/3293/9417/files/tezawobumasoguram.pdf
    • https://cdn.shopify.com/s/files/1/0432/9095/1848/files/mixisekujodo.pdf
    • https://cdn.shopify.com/s/files/1/0457/6618/1028/files/24846560872.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/ccnp_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/bevesem.pdf
    • https://cdn.shopify.com/s/files/1/0435/2314/5896/files/37412442052.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/princeton_review_mcat_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vinufew.pdf
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/68755008986.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_off00004f84.bin
a4dc3ba3362edc88a1e94a862ff903efc544458adbde51e221fc7032706aae95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F84 5308 bytes
font_01_sfnt_off00006194.bin
efe6ceda8240fda6a8d39287d506af8977c7e26eedf2392c644b9b85616c7568		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6194 13188 bytes
font_02_sfnt_off00008b13.bin
051837a0337477dfbb6902371460c1670985facfce249cf256f6d038aeae7303		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B13 16132 bytes

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