Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd74fac57ac6daa6…

MALICIOUS

PDF

40.3 KB Created: 2020-08-18 18:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a0f462d5c63d3efcdb80e5af2991086 SHA-1: 8c3f2933eaee81c21d8b418409a7c6bfb59fb768 SHA-256: dd74fac57ac6daa6be5c40924c58e23391bde9ab742aa5ff9aa602d7255c99a3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including a critical redirector link to "https://ttraff.cc/pify?keyword=pearson+correlation+spss+report". This indicates a likely attempt to lure users to malicious infrastructure under the guise of a report. The ML classifier strongly supports the malicious nature of this PDF. 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=pearson+correlation+spss+report
    • http://files.rekindlebylisa.com/uploads/1/3/1/8/131857580/rorewomido_gatexido_dagogezak_gatuvijotosotis.pdf
    • http://jumasexop.molongshow.com/uploads/1/3/1/3/131379578/84ba848702aa9.pdf
    • http://files.artcreate.org/uploads/1/3/1/4/131454492/koxemumadupal-garerawudibepes-nubejuxupizob-jawebebobok.pdf
    • http://juvaf.shopandcarry.com/uploads/1/3/2/8/132814500/2104853.pdf
    • http://numividem.agroecologynetwork.org/uploads/1/3/0/8/130874633/923670a0.pdf
    • https://cdn.shopify.com/s/files/1/0435/5670/0319/files/20669598428.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/rifomagovumusunirij.pdf
    • https://cdn.shopify.com/s/files/1/0430/3064/2837/files/nujefuregopopakesovubibup.pdf
    • https://cdn.shopify.com/s/files/1/0436/2623/4009/files/50275292438.pdf
    • https://cdn.shopify.com/s/files/1/0435/6482/6783/files/convert_to_base64_encoded_string_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/alzheimer_una_enfermedad_compartida.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/kojabis.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/gususabumoje.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/ankylosing_spondylitis_ayurvedic_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0447/9533/0717/files/nebraska_dhhs_food_stamp_income_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0434/5010/6018/files/49140839385.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_off0000611b.bin
9a4018ffdaaf253aeeca002a90ad08e8200f751fdc823555023ddb03173fd76a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x611B 4928 bytes
font_01_sfnt_off000071ec.bin
8fccbe4badd60dec6618d30ae7a8dcd5639cb30687a8c428c5286d4675f3365e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71EC 10040 bytes

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