Malicious PDF — malware analysis report

Static analysis result for SHA-256 198ea04619338828…

MALICIOUS

PDF

46.8 KB Created: 2020-09-11 08:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8339aa28e610b34a1036f1c72ec13de SHA-1: d1d9314e58bbbc4bc5eb3dbd2af14b9cba813a6e SHA-256: 198ea0461933882800d13b8a15610b571d1be2ef1a79d2159288bc5f8b21faa9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to SEO-optimized PDF farms. One of the embedded URLs, https://ttraff.me/wix?keyword=4+free+inductive+bible+study+worksheets, is identified as a malicious redirector, indicating an attempt to lead the user to harmful content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.me/wix?keyword=4+free+inductive+bible+study+worksheets
    • http://wetivevu.hodgmanrecipes.com/uploads/1/3/1/3/131378850/zofajevobex_lawodovozoxemu_taduviku_zutoxe.pdf
    • http://files.rivertonprairiedog.com/uploads/1/3/0/7/130739061/zodogulizaleb.pdf
    • http://files.laughingatus-design.com/uploads/1/3/1/4/131482931/saxanefurujamut-xomunuwum-kizebenolesobi-jakodivisatoxek.pdf
    • http://files.cbinderyservices.com/uploads/1/3/2/6/132681885/ligewu.pdf
    • http://files.christiantruththroughapologetics.com/uploads/1/3/0/7/130740069/vafafatakabem.pdf
    • http://files.4izon.com/uploads/1/3/1/4/131407818/folatesomuju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/4356/0346/files/daterangepicker_format_time.pdf
    • https://cdn.shopify.com/s/files/1/0465/5477/5702/files/aha_guidelines_for_infective_endocarditis_2015.pdf
    • https://cdn.shopify.com/s/files/1/0441/4432/8856/files/football_formation_sheet_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/79458789329.pdf
    • https://cdn.shopify.com/s/files/1/0449/5795/8299/files/mumeruxagaberowoje.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9996/files/kizikovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/15609506192.pdf
    • https://cdn.shopify.com/s/files/1/0433/9099/2549/files/counter_strike_1._6_free_bots.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a24.bin
17bd2650e8a70d5badb598395c81c732efe0294901e4937b17e4bf1effe28a4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A24 5232 bytes
font_01_sfnt_off00007bfa.bin
5e0bd840896393710d45aca77eb856a33b0b78665c54f6407ebb01030f975e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFA 10588 bytes
font_02_sfnt_off00009ff7.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF7 4324 bytes

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