Malicious PDF — malware analysis report

Static analysis result for SHA-256 4810da26ed26bdd7…

MALICIOUS

PDF

44.1 KB Created: 2020-08-12 19:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce374df560672eb35710b963675c1e90 SHA-1: 5f0ef458a244f484fa633386ed7ce9119ff76e2f SHA-256: 4810da26ed26bdd7dab98be1eddb48fd95cff81f61962d78f9868cc007f1011e
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, likely as part of a SEO poisoning or phishing campaign. The document body, though heavily obfuscated, contains the same malicious URL and other URLs pointing to PDF files, suggesting an attempt to drive traffic to malicious sites under the guise of providing free book downloads. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=marriott+s+practical+electrocardiography+13th+edition+pdf+free+download
    • http://lovijito.stasisves.com/uploads/1/3/1/3/131379362/wuzez.pdf
    • http://files.mynewonline.store/uploads/1/3/0/8/130874322/tetavutizepefu-disogasufuz-bamafos.pdf
    • http://files.silverfoxxjournal.com/uploads/1/3/1/3/131383380/mujaruwefonegoru.pdf
    • http://files.unitywinterguard.org/uploads/1/3/1/3/131379113/2586560.pdf
    • http://files.barrackvillechurch.com/uploads/1/3/1/4/131407823/bokitosuvotim_zokeguxuraxi_tuximop_wajokutopuxolu.pdf
    • https://cdn.shopify.com/s/files/1/0441/2011/3304/files/el_suicida_alfonso_reyes.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/14630678734.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/how_to_remove_dropbox_from_mac.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/rafulefebolaf.pdf
    • https://cdn.shopify.com/s/files/1/0444/0319/6070/files/blueprint_english_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.pdf
    • https://cdn.shopify.com/s/files/1/0437/4836/0343/files/english_word_list_with_meaning_and_sentence.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/kaplan_sat_physics.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/najumubatojowowiri.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/55289018360.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1553/files/86311504335.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6469/files/savaruwasizigobutitez.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/lowes_clearfield_pa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7715/files/fevegowavabuxumogomijave.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_off00005d07.bin
e299fd308d2eaf087a5db948e86f9d8cf71f0ad14098f4d4d5c67b1d40d255c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D07 5832 bytes
font_01_sfnt_off00007101.bin
e1d530069e49a773d3137e215d0e3aa1a45a6e63280ad17115e1adf18ab53e19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7101 16184 bytes

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