Malicious PDF — malware analysis report

Static analysis result for SHA-256 119a5ec952a2d5e7…

MALICIOUS

PDF

47.3 KB Created: 2020-08-21 14:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83b25185e775c44e91c8d6a4947a7662 SHA-1: ee1e64c9985f1ca148f98c8f3f23850ed3dcb097 SHA-256: 119a5ec952a2d5e78d40a0005cbf7f30e43bc7ffb73b3556581e26b339db4579
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, many of which point to external resources, including a known malicious redirector. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests a campaign to drive traffic to malicious sites, likely for phishing or malware distribution.

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=advance+directive+maryland+form
    • http://seviw.lancerdevault.com/uploads/1/3/1/4/131437657/marelamavukuv.pdf
    • http://files.inusagiroleplay-swrp.net/uploads/1/3/1/0/131070722/pevexosi.pdf
    • http://files.ourcollaborativeteam.com/uploads/1/3/1/4/131438539/jatisiragojip.pdf
    • http://files.bullengarookadultriders.com/uploads/1/3/0/8/130814605/nofivimagadofo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/43238538952.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/mexabulipudufexiwoluvib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/josuzafegeda.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/bunepomep.pdf
    • https://cdn.shopify.com/s/files/1/0432/3190/3902/files/encyclopedia_of_mathematics_james_stuart_tanton.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3212/files/41686504043.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/brazilian_portuguese_course.pdf
    • https://cdn.shopify.com/s/files/1/0428/7610/8956/files/pavalaxumokezonenup.pdf
    • https://cdn.shopify.com/s/files/1/0437/5897/7178/files/73983784023.pdf
    • https://cdn.shopify.com/s/files/1/0432/6896/4505/files/78983940368.pdf
    • https://cdn.shopify.com/s/files/1/0433/5478/3893/files/tekuduz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/ruzifoderozomupupuzisuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5711/files/4634241622.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4427/files/asepsia_y_antisepsia_medica.pdf
    • https://cdn.shopify.com/s/files/1/0465/2630/0318/files/bugejipapod.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_off00007020.bin
009df5371f1dbad12c93b9069950b0541ab9a7df466caeaf5170671ec2297c95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7020 4928 bytes
font_01_sfnt_off000080cc.bin
295cc5c43ff06c6e232ac1b2dfc139124a125ba8d5a502b231158f143eca3e4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80CC 9712 bytes
font_02_sfnt_off0000a218.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA218 4324 bytes

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