Malicious PDF — malware analysis report

Static analysis result for SHA-256 641b79dc56555486…

MALICIOUS

PDF

44.4 KB Created: 2020-08-12 09:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1684f7d5bf35050269b640cf8bc50ac SHA-1: bcd908554b80972de2260b5e6ac2d4cf84bdc62d SHA-256: 641b79dc5655548677d726953ab529759edab8905dc0045e6b63f03b8c5519dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which are part of a link farm designed to appear as educational resources. One prominent link, 'https://ttraff.com/wb?keyword=bse%20odisha%209th%20class%20science%20book%20pdf%20download', redirects to a known malicious infrastructure, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=bse%20odisha%209th%20class%20science%20book%20pdf%20download
    • http://wumuja.torontoallergygroup.com/uploads/1/3/1/0/131071164/7032abf.pdf
    • http://files.canadianteacherconsultants.com/uploads/1/3/1/1/131163559/petob.pdf
    • http://files.journeygenies.com/uploads/1/3/0/7/130740513/kirutuzedirexej_zetokopaze_pasumozodofir_serokoxutok.pdf
    • http://files.artrebel.net/uploads/1/3/1/4/131406811/de251.pdf
    • http://files.wilsonwildcatslearninglab.com/uploads/1/3/2/6/132682819/4300149.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/juwamufapatuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/starting_an_airline_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0437/7935/8869/files/13th_14th_and_15th_amendments_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/6419/7273/files/skyrim_immersive_weapons.pdf
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/arcview_gis_3._2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/japupasatenakal.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/tapemenawipatepuranaxuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/8121817447.pdf
    • https://cdn.shopify.com/s/files/1/0430/9155/8551/files/fillable_4856.pdf
    • https://cdn.shopify.com/s/files/1/0428/2069/8268/files/77730334831.pdf
    • https://cdn.shopify.com/s/files/1/0433/4980/3162/files/richard_branson_autobiography_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4142/files/a_thousand_plateaus_capitalism_and_schizophrenia.pdf
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/wulefufimimipufi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cad.bin
4e8cb3c524908205498be5aa87a4509fba40915c64bd97cbdd8fdc648a978f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAD 5648 bytes
font_01_sfnt_off00007fe9.bin
cf94dab79027c07fbd092b1024dd546e3aa754cd777285584f19b35eb78d1b62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE9 10656 bytes

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