Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff070e0fa17a8182…

MALICIOUS

PDF

36.7 KB Created: 2020-08-11 06:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0ecb9a99606d608beeda195098e4235 SHA-1: c1491c2eeb3d77d96212ff8d7778b6c92794b08d SHA-256: ff070e0fa17a8182fbe799d54fbfafcc9f1bdf0209669101991d0d43fb55ec47
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This indicates a phishing or redirection attempt, likely to deliver a malicious payload or lead the user to a fraudulent site. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence of malicious intent.

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/wb?keyword=manual%20de%20derecho%20penal%20zaffaroni%20pdf%20descargar
    • http://jubul.evonshope.org/uploads/1/3/1/4/131409090/goxel_basafobojemeso_bomabuw_gabefupadasel.pdf
    • http://files.alittlelessbacon.com/uploads/1/3/1/4/131452938/b32fdb3.pdf
    • http://files.theroute92.com/uploads/1/3/0/8/130873973/zuguxizamuri.pdf
    • http://files.vision-networking.ca/uploads/1/3/2/7/132740536/101257.pdf
    • http://files.offtheplinth.com/uploads/1/3/0/8/130874691/ludovo_lajugufu_pepuxisuz_vaminob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2247/5687/files/tasusakuvozowosike.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9794/files/excellent_verbal_and_written_communication_skills_examples.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/mawukumumuparapevusa.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/87701404037.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/zexosegebonuwidita.pdf
    • https://cdn.shopify.com/s/files/1/0437/1942/6198/files/17963160882.pdf
    • https://cdn.shopify.com/s/files/1/0428/3554/2182/files/11088275432.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/tejilagopag.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0454/files/basel_committee_operational_risk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3042/files/wojufoteguvefajoxumivafuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/nuzat.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_off000044df.bin
61edc5fc36728730e0c572d9d749e4904d08674c682305dd8eed38c8202cf1aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44DF 5272 bytes
font_01_sfnt_off000056c1.bin
3ee795a3ce2788a3b8d55e362be94b77368bd6cc866f7f4ab75675f268b49904		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56C1 9464 bytes
font_02_sfnt_off0000759b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759B 4324 bytes

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