Malicious PDF — malware analysis report

Static analysis result for SHA-256 a82edfcd61457aa1…

MALICIOUS

PDF

44.4 KB Created: 2020-08-08 16:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 091e089874821f44a2c3f9bff271b015 SHA-1: 752f9e5ca9c63c64ac218556df27de9a093fc9ea SHA-256: a82edfcd61457aa14198e12affb3e12bd948a99e143642f4c37fff32d6b795fe
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to trick users into visiting malicious infrastructure. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning and driving traffic to malicious sites.

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=horario+cercanias+alicante+murcia+pdf
    • http://files.rodolfoangeloni.net/uploads/1/3/0/7/130776877/napasejizedokopivupo.pdf
    • http://files.yournextapparel.net/uploads/1/3/0/8/130874128/nabaru.pdf
    • http://files.triwholehealth.com/uploads/1/3/1/4/131438847/xakepisugedit_jepitogix_komudobeji_rabutuwok.pdf
    • http://latuze.sideshowscarnival.com/uploads/1/3/1/0/131070420/7090206.pdf
    • http://files.lifethoughtspublishing.com/uploads/1/3/0/7/130739313/293db.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/55820494581.pdf
    • https://cdn.shopify.com/s/files/1/0436/1938/5502/files/zulesakobagu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7826/files/dekej.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/zoteru.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/33254194973.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/vabopijesebenarakeke.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/54582679447.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1863/files/jopetubulupupa.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/94115204708.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/amazing_grace_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/5542/4423/files/refuni.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/10830527032.pdf
    • https://cdn.shopify.com/s/files/1/0428/5700/5215/files/rataxasiwidanux.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/xorekonifiradimeweno.pdf
    • https://cdn.shopify.com/s/files/1/0433/4413/4294/files/ielts_general_writing_task_1_samples.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/
    • https://cdn.shopify.com/s/files/1/0428/5700/5215/files/rataxa

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064e9.bin
d6b3f2cc43b616cb35f98165a7a62d91638ceb64c13f3002a580983cd20c90ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E9 5260 bytes
font_01_sfnt_off000076b3.bin
e31641fca48bdd68aebd0583e958602efe298ea4fa77122849a7ea5e424cfc3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B3 14100 bytes

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