Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c14e93ed7b1bb40…

MALICIOUS

PDF

37.8 KB Created: 2020-08-14 05:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35b333344eb72d3a3cc00a6d040b539c SHA-1: e42ca2dd78593d65f9efdb8a47f17c36778c584b SHA-256: 7c14e93ed7b1bb40f1d425de122c6dce4075f8000c4d25137ce76a40af3de620
202 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, luring users with the promise of a prize or lottery winnings. It contains a prominent 'download' call-to-action and links to a known malicious redirector. The document's structure and embedded links strongly suggest an attempt to direct users to malicious infrastructure, likely to download further malware or engage in phishing.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=science+comprehension+worksheets+ks3
    • http://files.marshallglassgc.com/uploads/1/3/2/6/132681779/5567940.pdf
    • http://femapi.thealbertafloodroseproject.com/uploads/1/3/0/7/130776699/bojaxip.pdf
    • http://files.ballroom-blitz.com/uploads/1/3/1/0/131070207/af60b7b896.pdf
    • http://files.shahrizzal.com/uploads/1/3/1/6/131636589/5c966a8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/18514436509.pdf
    • https://cdn.shopify.com/s/files/1/0432/0106/9220/files/calendario_biodinamico_2020_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/zusudulefuzajejipageg.pdf
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/13296153655.pdf
    • https://cdn.shopify.com/s/files/1/0431/7056/2209/files/wukejosurog.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5789/files/jelusanidefewe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/batidezagugibudor.pdf
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/gk_capsule_bankers_adda.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3100/files/weditarozabawexo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/tamakagibabibofal.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/gasapagexipodilonowe.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_off0000542d.bin
54f20030f9d5e5594458c7c4ff84a7432e0a66aa0351f080743c9a083a98211a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x542D 5352 bytes
font_01_sfnt_off00006640.bin
0afdfccd7adde05072d312b813d5964caed3d2995ef09fdf85315be82b5178ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6640 10552 bytes

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