Malicious PDF — malware analysis report

Static analysis result for SHA-256 e72658bff752de4e…

MALICIOUS

PDF

52.7 KB Created: 2020-08-28 18:08:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32b0936bce225d731ed64bed0e19da01 SHA-1: bdbb467a73003446c175e39529370758e9283efa SHA-256: e72658bff752de4eef54bba3559bfa1101af3a29461c4118e0826c2b3b9c510a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high density of embedded links, with one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains a URL that matches the redirector. The presence of numerous shopify.com links suggests a link farm or SEO poisoning tactic to disguise malicious intent. The ML classifier strongly flagged this PDF as malicious.

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=template+rekod+persediaan+mengajar+2019
    • https://cdn.shopify.com/s/files/1/0440/5664/1701/files/upkar_movie_video_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7355/2040/files/juwuzosokiziv.pdf
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/critical_race_theory_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/bullworker_bible_pdf_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/1067/9203/files/70352284090.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd95d354f52045b6937cb42309b17429.pdf
    • https://static.usrfiles.com/ugd/b8c837_bffe960db9a440b49904ed44d1a28be5.pdf
    • https://cdn.shopify.com/s/files/1/0434/0380/4839/files/47392828078.pdf
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/nec_2014_handbook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/2274/3712/files/51681250426.pdf
    • https://cdn.shopify.com/s/files/1/0431/4660/8794/files/smadav_antivirus_setup_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0428/8453/0343/files/ay_papi_16.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068b2.bin
551e980ce3a3bd32759ef1afa3492644b090f2a85d3eaa412a4eb3b3076c513a
pdf-font-stream PDF embedded font (sfnt) at offset 0x68B2 5852 bytes
font_01_sfnt_off00007c8a.bin
076e9150eb803b6a830d5890b4216d9345dd3ec005adba89b2fd6545545889bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8A 3012 bytes
font_02_sfnt_off00008922.bin
64841bbd9b4f8db85ecb1cd5fbd4f067d1527a26b3364371f10a7f3f89510906
pdf-font-stream PDF embedded font (sfnt) at offset 0x8922 10804 bytes
font_03_sfnt_off0000ae2b.bin
e541206514e3d33ae5c23cd7d0a569397cb2ceaeff6b9086fcf38853330934bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE2B 16636 bytes