Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c13dfc9955e5df0…

MALICIOUS

PDF

70.3 KB Created: 2020-08-29 08:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8015eb5c3d86f124c35f0830f2b3f7f0 SHA-1: 8886fe883c3ee944f0bfd114f836e7367d663276 SHA-256: 5c13dfc9955e5df08c0e215d5c5c45101a758424d14787e515e1a3ac9e260bec
154 Risk Score

Malware Insights

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

The PDF contains a link to `https://ttraff.com/wix?keyword=akashic+records+of+a+bastard+magic+instructor`, which is flagged as malicious redirector infrastructure. The document also contains a large number of links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this assessment.

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/wix?keyword=akashic+records+of+a+bastard+magic+instructor
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/filusitemukovafasep.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7969/files/xuxobanagegezovaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1336/files/rejifovokita.pdf
    • https://cdn.shopify.com/s/files/1/0436/9973/2635/files/nesidon.pdf
    • https://cdn.shopify.com/s/files/1/0454/2952/2588/files/beqabu_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0434/0839/2353/files/audio_cutter_joiner_software_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_95a2de1656cb4c7db8a4ad7c9169c6ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7611be48a7a4df19e2892168bd938e0.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/xerepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8768/files/analisi_logica_schema_riassuntivo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/sumarinoniti.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9946/files/62775247603.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_off000085aa.bin
52057786c5f3db7be46383ab6e651121f6edcc8c4487ed4a83426158c2cd5975
pdf-font-stream PDF embedded font (sfnt) at offset 0x85AA 24336 bytes
font_01_sfnt_off0000d2fc.bin
a1e6405b9750e37d0ac2c65be3c6dfaa86be661d280169cf6156f3a5be9aa735
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FC 5596 bytes
font_02_sfnt_off0000e5d4.bin
83300dcbf03b4e826d42d0b0b5d13081826bc89118b1da77ca0142f84b101c2e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D4 10508 bytes