Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9310be18a115bdf…

MALICIOUS

PDF

81.8 KB Created: 2020-08-20 02:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d0815f12e64d482093d1ec989f21b1e SHA-1: 0b064c8762eacc03b3ffde591fae10fd00ee60b8 SHA-256: a9310be18a115bdf523becc18c25ec145d74db95ea8b57977f1ec2243ba0cecc
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains but one specifically to a malicious redirector. The document body contains the URL that triggered the malicious redirector heuristic, suggesting a lure to entice users to click.

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=free+bootstrap+ecommerce+templates+2018
    • http://files.burtongreenparishcouncil.org/uploads/1/3/1/4/131483305/lebejukolazakagalok.pdf
    • http://files.gaitwaychiropractic.com/uploads/1/3/0/7/130776490/253680.pdf
    • http://files.childsafefence.com/uploads/1/3/1/3/131383982/4c18eab7.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/edema_pulmonar_neurogenico_fisiopatologia.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/womazakifubuvosedez.pdf
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/essential_mathematics_for_economics_and_business_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/cancer_de_celulas_no_pequeas_pulmon.pdf
    • https://cdn.shopify.com/s/files/1/0429/9970/9855/files/camara_colombiana_de_comercio_electronico.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/vujosaroxunuxelojobiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/4160/3239/files/pdf_to_doc_converter_online_zamzar.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/zovosabadopelogenos.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/application_android_camscanner.pdf
    • https://cdn.shopify.com/s/files/1/0433/8686/3783/files/ryobi_weed_eater_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8274/files/gta_4_mods_xbox_360.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3188/files/89676340503.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102aa.bin
d3d0222d1094c7738a032f17d6d73e2cce53df2311b341cd222c019556438552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102AA 5696 bytes
font_01_sfnt_off000115f4.bin
209ddd0d10d8481ea285bf40af4401e9b116da57dee39dfe4474a4f0c51164f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115F4 10580 bytes

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