Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fc2a18fc373e77…

MALICIOUS

PDF

40.9 KB Created: 2020-08-17 03:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8e4121870adcb11434e6c06e18176aa SHA-1: 4292f411aaf99661ff213e71c13b9698511bb65f SHA-256: 72fc2a18fc373e7713cfe5575bce100b715118a496b2906970e47f170f631c52
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector to malicious infrastructure, suggesting a phishing or scam attempt. The embedded document body text, though garbled, contains keywords related to a printer driver download, likely a lure. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to known 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=canon+pixma+e510+printer+driver+free
    • http://files.auturbo.com/uploads/1/3/2/7/132712661/6a15c0b49bc8683.pdf
    • http://narubef.discovery-dayschildcare.com/uploads/1/3/1/3/131398560/bepaniz.pdf
    • http://zager.perockss.com/uploads/1/3/0/7/130776445/dawitavelomotozulep.pdf
    • http://files.elginfiremuseum.com/uploads/1/3/2/6/132682134/junav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/24979381535.pdf
    • https://cdn.shopify.com/s/files/1/0434/0314/9462/files/napaxosibozitav.pdf
    • https://cdn.shopify.com/s/files/1/0429/1896/9507/files/61796280518.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0605/files/kirkpatrick_model_of_curriculum_evaluation.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8194/files/sasarasosoxavi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/95923085711.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/west_virginia_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/fever_of_unknown_origin_pediatrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/9970/7805/files/buxinofob.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/transistor_bd139_smd.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006183.bin
2031777841a762936b6c69a6c99b0f43a926f3d442254d863193e9769ed83af6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6183 5328 bytes
font_01_sfnt_off000073a1.bin
0065352ea46a972763e43810a9787cc6190609276f2b5e5e05850db4bdaf872f
pdf-font-stream PDF embedded font (sfnt) at offset 0x73A1 10264 bytes