Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ed3e1104c36f9a…

MALICIOUS

PDF

55.1 KB Created: 2020-08-08 00:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 394267bfa485644578937d8aff76076e SHA-1: bcfc1b00ec12441eca47d4b63210aed2536356f6 SHA-256: 72ed3e1104c36f9aba2a004f76f605af4d75c7e509c31e070200987cddd799c8
234 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector link to a known malicious domain, indicating a phishing or scam attempt. The document body and heuristics suggest a lure for advance-fee scams and a prompt to install a browser extension or update, which are common social engineering tactics. While no scripts were extracted, the presence of embedded URLs and the nature of the lures strongly suggest malicious intent, likely to lead the user to a malicious site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.ru/pify?keyword=biopsychology+pinel+pdf
    • http://jisavaxat.deercreekarchery.com/uploads/1/3/0/7/130775918/5748837.pdf
    • http://files.hectorhandmade.com/uploads/1/3/0/7/130738943/dakuvegetinerilubusu.pdf
    • http://files.centerpointeatbridgewater.com/uploads/1/3/2/7/132712206/1b2521394df8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/upper_limb_anatomy_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0444/4097/7574/files/videoscribe_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0620/5857/files/super_mario_bros_3_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18396470220.pdf
    • https://cdn.shopify.com/s/files/1/0439/0912/0152/files/91692502413.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/sajofedevuwolujawisuzorev.pdf
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/rapipenageligalitixup.pdf
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/rexedovopunivisuzobudumuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/97006258549.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/38837974961.pdf
    • https://cdn.shopify.com/s/files/1/0433/6720/2974/files/joboxosatunanikapote.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/kesasu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/create_dataframe_from_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90685258811.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_off00008cd6.bin
dbf430b56036bae0b54ca9e46fc8ac72db5931b2d03d2f4eb8ac73257a1a8e47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD6 4972 bytes
font_01_sfnt_off00009db1.bin
7caed2624305513969880a4dab21306a7cee76212a3d1d09205bba3a4595e7e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB1 10544 bytes
font_02_sfnt_off0000c1b5.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B5 4324 bytes

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