Malicious PDF — malware analysis report

Static analysis result for SHA-256 945af99fa5faeb17…

MALICIOUS

PDF

44.9 KB Created: 2020-08-08 06:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19e500af0d36539de7486bf3dea98943 SHA-1: 05548cbcee50ca836bfc328996d7b7725c71a6be SHA-256: 945af99fa5faeb1719055d0959742f612e59d5b763548c3b4ef499e9dffdc77f
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a larger link farm, likely for SEO manipulation or to distribute malicious content.

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=name+reactions+in+organic+chemistry+class+11+pdf
    • http://files.xebex.eu/uploads/1/3/1/4/131483279/jajoju.pdf
    • http://files.conleysmartialarts.net/uploads/1/3/2/6/132682829/vifaguzejexa.pdf
    • http://files.operationbluepride.org/uploads/1/3/0/7/130775334/zigevifewagobowire.pdf
    • http://files.chiroedu.net/uploads/1/3/2/6/132681356/9214424.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/vomig.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2359/files/satufolapipidamisis.pdf
    • https://cdn.shopify.com/s/files/1/0434/3778/5240/files/dogusevapesovisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4545/files/mechanism_of_accommodation_of_eye.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/pathophysiology_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/xazewulupozulufeni.pdf
    • https://cdn.shopify.com/s/files/1/0450/4341/7246/files/atul_maheshwari_chatravriti_yojna_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/lofekuworute.pdf
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/6181434448.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6681/files/lopafamevolifedobexekugaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/butterfly_valve_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/dolevilofagitojudugin.pdf
    • https://cdn.shopify.com/s/files/1/0428/8253/1481/files/30811499851.pdf
    • https://cdn.shopify.com/s/files/1/0431/4690/3709/files/ralopemibopif.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_off000070f5.bin
21eeae009dfa8089b1b3ccce4acdbcc0838af3c9d101771320f2cd41f3f828a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F5 5692 bytes
font_01_sfnt_off0000843e.bin
7d56b1ad53677d9ec0caa9e1f410865b7e1b9d1cbcedbbab6f7359de1a3ca7a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x843E 9912 bytes

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