Malicious PDF — malware analysis report

Static analysis result for SHA-256 635d65fea1a172ba…

MALICIOUS

PDF

48.5 KB Created: 2020-08-07 03:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b17c240185103f45920fb5b92ca34c7 SHA-1: 1ae217b88a29b9c7ef73c8d23128732a7718e657 SHA-256: 635d65fea1a172baeabf2b8cdc0833e15fe105abca9925ea017053b6d82361cb
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.cc/pify?keyword=vertical+arrow+technique+pdf. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, many hosted on Shopify, suggests a tactic to obscure the ultimate destination. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, likely leading to a phishing or malware download page.

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=vertical+arrow+technique+pdf
    • http://besamu.onceuponatimefitness.com/uploads/1/3/2/3/132302780/wewijasikep.pdf
    • http://files.az-tennisacademy.com/uploads/1/3/1/8/131856176/kuzixi_kovitikixujajep_nusaraw.pdf
    • http://files.mil2civmentor.com/uploads/1/3/1/4/131452741/fb1e50a4f7ef.pdf
    • http://files.amastaff.org/uploads/1/3/1/4/131455463/863958.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/8710/9023/files/53701719786.pdf
    • https://cdn.shopify.com/s/files/1/0433/3584/3994/files/belenetasadow.pdf
    • https://cdn.shopify.com/s/files/1/0437/9164/6880/files/monitiduturaju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/69138564811.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/pujusamid.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/polulofesegutalurufanu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/wemadugefotavakajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4567/files/wheel_of_time_chapter_summaries.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20931566490.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/gowevivujoluxog.pdf
    • https://cdn.shopify.com/s/files/1/0441/1051/2280/files/35531031594.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/bioremediation_meaning.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_off00007344.bin
d496829f05a2197b986453b902e01cd2664e834ae345c9161892ec598f0fcad9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7344 5128 bytes
font_01_sfnt_off000084b3.bin
1ae99aa0ed93f014ecb85de04200bcc3289c065165c5e9d018b0ca5417520779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B3 10124 bytes
font_02_sfnt_off0000a71d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA71D 4324 bytes

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