Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5963b234f54891…

MALICIOUS

PDF

41.7 KB Created: 2020-08-23 12:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c62d5eee96c962115822fa0d8f3e984e SHA-1: ea5fd1150cd5bb88bb2bff1b05ecdd8abec1a0bf SHA-256: 8f5963b234f548919612d5a53f44239baff0e93b322930632783e69012ccaeb6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=almighty+god+idle+clicker+guide', which is also listed as a malicious redirector. The presence of a large link farm, with many pointing to Shopify domains, suggests an attempt to leverage SEO or distribute content through seemingly benign platforms before redirecting to malicious sites. No scripts were extracted from this sample.

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=almighty+god+idle+clicker+guide
    • http://zafugibig.torreypinesfootball.com/uploads/1/3/1/3/131379958/zoloruladobekin_vunas_jugasos.pdf
    • http://files.howardclubsouthwestflorida.org/uploads/1/3/0/8/130815437/3491590.pdf
    • http://files.saultblues.com/uploads/1/3/0/7/130775528/bawojaxefijisabaki.pdf
    • http://files.theultimategaminggalaxy.com/uploads/1/3/0/7/130740149/e640619.pdf
    • http://files.shisko.com/uploads/1/3/1/4/131407918/4336510.pdf
    • https://cdn.shopify.com/s/files/1/0429/4003/9324/files/complete_the_sentence_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/ragijipulute.pdf
    • https://cdn.shopify.com/s/files/1/0435/0718/7872/files/english_word_stress_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/3458/2938/files/56713264216.pdf
    • https://cdn.shopify.com/s/files/1/0438/6262/2358/files/8095205118.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/viranofopukaseteromararus.pdf
    • https://cdn.shopify.com/s/files/1/0462/0084/8537/files/combination_circuits_worksheet_physics_classroom_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/80826444661.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/aadhar_card_update_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/99481834791.pdf
    • https://cdn.shopify.com/s/files/1/0429/2493/3283/files/comment_attirer_l_argent_avec_le_basilic.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5045/files/junior_accountant_job_description.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_off000064d9.bin
374a86cb60b2be55bd8d86dffb7a85ed0b48eac7466b1d68de1ecc919b97b731		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D9 5120 bytes
font_01_sfnt_off00007621.bin
4d8687b47144242b10d7111a79291da1ffdc8b50b869e5fcf9bce86816441a8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7621 10524 bytes

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