Malicious PDF — malware analysis report

Static analysis result for SHA-256 2440339e4f24dac6…

MALICIOUS

PDF

56.9 KB Created: 2020-10-26 14:56:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4964da7db8304a5a347aa200d0e3fed7 SHA-1: d95cc5ddba29901ca7401879a8ff1e63275323a6 SHA-256: 2440339e4f24dac66cbadf2f3d2c11a712f582f197729f6082e788c51e797c27
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/123?keyword=mollie+makes+dandy+lion+instructions In PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/tonivavazozuraz-tadekedexidaja.pdfIn PDF document text
    • https://bonujuvab.weebly.com/uploads/1/3/2/7/132740321/tulubaposite.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9191/3632/files/wrestling_revolution_3d_apk_mod_2k18.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/oceanofapk_game_of_life.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4161/8082/files/directv_now_remove_channels_from_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/guided_meditation_by_joe_dispenza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/224705b4-be1a-4613-b46c-8534c7e90455/48947748894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b4d603f-0095-4e99-ac19-4bef1b40328f/85453099334.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/englisch_abitur_2018_bw.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/orbital_mechanics_and_astrodynamics.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/general_aptitude_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/bmtc_bus_route_map.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/anti_intellectualism_in_the_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/893b56c3-3d07-4d39-aa53-2eac4b10d013/manual_filling_machine_for_liquid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3161b494-5a3e-43db-9ebb-13a1a17f20b7/bevelosuzebigurejiruzidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6150de1c-f8c7-457b-9f55-c2e79b6e08fd/62877599671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2a899bb-443b-4968-b309-1ecce6b01e42/80580595907.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/mozofidamiwagekiw.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/ancova_table.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/48008810238.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92B5 5256 bytes
SHA-256: ee43a217ce61c2d77e8fd5342eba53d02a6c469203b25187434f3aee073b48a6
font_01_sfnt_off0000a481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA481 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0000afe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE5 11040 bytes
SHA-256: c2e450819dd0966f083288490dada6e82910646d18458c3a46a0c2e027d407cf