Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d4663dd6893fce…

MALICIOUS

PDF

39.4 KB Created: 2020-08-08 21:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc71813ed883f3828074afc07f50193c SHA-1: 757449c5d4dd2ea07dc152575ae7490abb64c0d8 SHA-256: f1d4663dd6893fce495827efd8a4bb07401f278b9366c9440d2afd9e5a9e3ba9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, embedding numerous external links, with at least one identified as a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=azkar+al+nawm+pdf', is designed to lead users to harmful content. The presence of a large number of links, many pointing to Shopify domains, suggests an attempt to obscure the malicious intent and potentially leverage SEO tactics for 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.cc/pify?keyword=azkar+al+nawm+pdf
    • http://files.longbowtaxidermywi.com/uploads/1/3/2/3/132303009/fosajemut.pdf
    • http://files.votelogan53.com/uploads/1/3/1/4/131407552/855cc94584bd3c.pdf
    • http://files.diamondedgejewelers.com/uploads/1/3/0/8/130814225/sipodowefifemas_xeguwowevuxij.pdf
    • http://files.anniemeekmontgomery.com/uploads/1/3/2/8/132815787/punaloguwenelo-votilon.pdf
    • http://files.cvpdtraining.com/uploads/1/3/2/3/132302871/xotikujeseno_sivane.pdf
    • https://cdn.shopify.com/s/files/1/0440/8007/0808/files/bass_guitar_chord_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/7434014501.pdf
    • https://cdn.shopify.com/s/files/1/0431/9523/6509/files/pusozowekorelawatila.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/71360102652.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/precalculus_mathematics_for_calculus_6th.pdf
    • https://cdn.shopify.com/s/files/1/0431/8671/6830/files/katiraripaxiwujirugozixum.pdf
    • https://cdn.shopify.com/s/files/1/0434/0793/3603/files/automatic_film_processing.pdf
    • https://cdn.shopify.com/s/files/1/0439/7082/2302/files/pediatric_cpr_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/2171/9959/files/lefapepapevofoferuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/capacity_building_strategies.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048bf.bin
6b7547fc4349fd488a129bdb6342f30a7bf7886eaf80b266bf46dd5b615bea79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48BF 5204 bytes
font_01_sfnt_off00005a81.bin
e6555074ad4b332c6791e6d46c3f63317f872bb70c59f62fc5b3ca2ee840a5ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A81 9732 bytes
font_02_sfnt_off00007c03.bin
202972718a71153b04f29f58d01e826ce929d6858cd92d26598210763eccb38b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C03 16060 bytes

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