Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22591b967cdaa37…

MALICIOUS

PDF

45.3 KB Created: 2020-08-12 02:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeb9b98e806f7244bd07bd6e86354291 SHA-1: 21bd5413934db166105f1290c03f8f93c03dc9bc SHA-256: a22591b967cdaa37cf8acb4ad2497419858aa6f9c62ef1a176bb25bf9640c4e9
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is used in conjunction with a large number of embedded links to external PDFs, many hosted on Shopify, likely as part of a link farm to improve search engine ranking for malicious content. The primary malicious URL is https://ttraff.cc/pify?keyword=email+writing+format+cbse+class+10+pdf, which serves as the initial lure. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attack.

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=email+writing+format+cbse+class+10+pdf
    • http://files.lanterninitiative.com/uploads/1/3/1/4/131453355/sabojogitenegex.pdf
    • http://files.chasemichaelmusic.com/uploads/1/3/1/4/131453198/fokowisakepowo.pdf
    • http://files.ekstasisinstitute.org/uploads/1/3/2/3/132303012/7441717.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9499/files/gegirewowudupotepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3234/6773/files/carer_allowance_form_australia.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/31128790826.pdf
    • https://cdn.shopify.com/s/files/1/0432/7912/2587/files/kufaxiwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3876/0342/files/56079178181.pdf
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/vewinebapenorokimalifuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6522/files/kekiwobumozuvolo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9829/1870/files/apache_cordova_4_programming_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0792/4635/files/download_ready_player_one.pdf
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/kabajodaratezek.pdf
    • https://cdn.shopify.com/s/files/1/0438/3001/8210/files/35247400529.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/bihar_police_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/88927148832.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/kerijovipowogefate.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/tumolaza.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007175.bin
ea2256fd1f911ffc88ed71f9ca2eaf657532ba3a9cccf9913969fbd4b07c7b1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7175 5860 bytes
font_01_sfnt_off00008551.bin
8a8310356154b20088790f510094699fdccfaaa3bf913f8984c3aa9a16fee5b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8551 10128 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.